diff --git a/.github/workflows/fork-pr-notice.yml b/.github/workflows/fork-pr-notice.yml
index dd697915f7..42b1e54c3f 100644
--- a/.github/workflows/fork-pr-notice.yml
+++ b/.github/workflows/fork-pr-notice.yml
@@ -11,9 +11,10 @@ jobs:
   welcome:
     runs-on: ubuntu-latest
     name: Welcome comment
+    if: github.event.pull_request.fork != null
     steps:
       - name: Add auto-generated commit warning
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7
         with:
           script: |
             github.rest.issues.createComment({
@@ -22,9 +23,9 @@ jobs:
               repo: context.repo.repo,
               body: `Thank you for your contribution! Here are a few things to check in the PR to ensure it's reviewed as quickly as possible:
             
-                - Your branch should be based on `origin/develop`, at least when it was created.
-                - There is a changelog entry in the `changelog.d` folder with [the Towncrier format](https://towncrier.readthedocs.io/en/latest/tutorial.html#creating-news-fragments).
-                - The test pass locally running `./gradlew test`.
-                - The code quality check suite pass locally running `./gradlew runQualityChecks`.
-                - If you modified anything related to the UI, including previews, you'll have to run the `Record screenshots` GH action in your forked repo: that will generate compatible new screenshots. However, given Github Actions limitations, **it will prevent the CI from running temporarily**, until you upload a new commit after that one. To do so, just pull the latest changes and push [an empty commit](https://coderwall.com/p/vkdekq/git-commit-allow-empty).`
+              - Your branch should be based on \`origin/develop\`, at least when it was created.
+              - There is a changelog entry in the \`changelog.d\` folder with [the Towncrier format](https://towncrier.readthedocs.io/en/latest/tutorial.html#creating-news-fragments).
+              - The test pass locally running \`./gradlew test\`.
+              - The code quality check suite pass locally running \`./gradlew runQualityChecks\`.
+              - If you modified anything related to the UI, including previews, you'll have to run the \`Record screenshots\` GH action in your forked repo: that will generate compatible new screenshots. However, given Github Actions limitations, **it will prevent the CI from running temporarily**, until you upload a new commit after that one. To do so, just pull the latest changes and push [an empty commit](https://coderwall.com/p/vkdekq/git-commit-allow-empty).`
             })
diff --git a/.github/workflows/maestro.yml b/.github/workflows/maestro.yml
index 3b52235fb5..0e2dc74b92 100644
--- a/.github/workflows/maestro.yml
+++ b/.github/workflows/maestro.yml
@@ -24,31 +24,31 @@ jobs:
       cancel-in-progress: true
     steps:
       - name: Remove Run-Maestro label
-        if: ${{ !github.event.pull_request.fork && github.event.label.name == 'Run-Maestro' }}
+        if: ${{ github.event_name == 'pull_request' && github.event.label.name == 'Run-Maestro' }}
         uses: actions-ecosystem/action-remove-labels@v1
         with:
           labels: Run-Maestro
       - uses: actions/checkout@v4
-        if: ${{ !github.event.pull_request.fork }}
+        if: (github.event_name == 'pull_request' && github.event.pull_request.fork == null) || github.event_name == 'workflow_dispatch'
         with:
           # Ensure we are building the branch and not the branch after being merged on develop
           # https://github.com/actions/checkout/issues/881
           ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.ref }}
       - uses: actions/setup-java@v4
         name: Use JDK 17
-        if: ${{ !github.event.pull_request.fork }}
+        if: (github.event_name == 'pull_request' && github.event.pull_request.fork == null) || github.event_name == 'workflow_dispatch'
         with:
           distribution: 'temurin' # See 'Supported distributions' for available options
           java-version: '17'
       - name: Assemble debug APK
         run: ./gradlew :app:assembleDebug $CI_GRADLE_ARG_PROPERTIES
-        if: ${{ !github.event.pull_request.fork }}
+        if: (github.event_name == 'pull_request' && github.event.pull_request.fork == null) || github.event_name == 'workflow_dispatch'
         env:
           ELEMENT_ANDROID_MAPTILER_API_KEY: ${{ secrets.MAPTILER_KEY }}
           ELEMENT_ANDROID_MAPTILER_LIGHT_MAP_ID: ${{ secrets.MAPTILER_LIGHT_MAP_ID }}
           ELEMENT_ANDROID_MAPTILER_DARK_MAP_ID: ${{ secrets.MAPTILER_DARK_MAP_ID }}
       - uses: mobile-dev-inc/action-maestro-cloud@v1.8.0
-        if: ${{ !github.event.pull_request.fork }}
+        if: (github.event_name == 'pull_request' && github.event.pull_request.fork == null) || github.event_name == 'workflow_dispatch'
         with:
           api-key: ${{ secrets.MAESTRO_CLOUD_API_KEY }}
           # Doc says (https://github.com/mobile-dev-inc/action-maestro-cloud#android):
diff --git a/changelog.d/1949.bugfix b/changelog.d/1949.bugfix
new file mode 100644
index 0000000000..a49aff7545
--- /dev/null
+++ b/changelog.d/1949.bugfix
@@ -0,0 +1 @@
+Make sure the media viewer tries the main url first (if not empty) then the thumbnail url and then not open if both are missing instead of failing with an error dialog
diff --git a/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesFlowNode.kt b/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesFlowNode.kt
index 9f0a91fa52..7343e56529 100644
--- a/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesFlowNode.kt
+++ b/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesFlowNode.kt
@@ -255,17 +255,21 @@ class MessagesFlowNode @AssistedInject constructor(
                 overlay.show(navTarget)
             }
             is TimelineItemStickerContent -> {
-                val navTarget = NavTarget.MediaViewer(
-                    mediaInfo = MediaInfo(
-                        name = event.content.body,
-                        mimeType = event.content.mimeType,
-                        formattedFileSize = event.content.formattedFileSize,
-                        fileExtension = event.content.fileExtension
-                    ),
-                    mediaSource = event.content.mediaSource,
-                    thumbnailSource = event.content.thumbnailSource,
-                )
-                overlay.show(navTarget)
+                /* Sticker may have an empty url and no thumbnail
+                   if encrypted on certain bridges */
+                if (event.content.preferredMediaSource != null) {
+                    val navTarget = NavTarget.MediaViewer(
+                        mediaInfo = MediaInfo(
+                            name = event.content.body,
+                            mimeType = event.content.mimeType,
+                            formattedFileSize = event.content.formattedFileSize,
+                            fileExtension = event.content.fileExtension
+                        ),
+                        mediaSource = event.content.preferredMediaSource,
+                        thumbnailSource = event.content.thumbnailSource,
+                    )
+                    overlay.show(navTarget)
+                }
             }
             is TimelineItemVideoContent -> {
                 val navTarget = NavTarget.MediaViewer(
diff --git a/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/model/event/TimelineItemStickerContent.kt b/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/model/event/TimelineItemStickerContent.kt
index e608ed824a..9c8070ecc9 100644
--- a/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/model/event/TimelineItemStickerContent.kt
+++ b/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/model/event/TimelineItemStickerContent.kt
@@ -16,7 +16,6 @@
 
 package io.element.android.features.messages.impl.timeline.model.event
 
-import io.element.android.libraries.core.mimetype.MimeTypes
 import io.element.android.libraries.matrix.api.media.MediaSource
 
 data class TimelineItemStickerContent(
@@ -33,9 +32,7 @@ data class TimelineItemStickerContent(
 ) : TimelineItemEventContent {
     override val type: String = "TimelineItemStickerContent"
 
-    val preferredMediaSource = if (mimeType == MimeTypes.Gif) {
-        mediaSource
-    } else {
-        thumbnailSource ?: mediaSource
-    }
+    /* Stickers are supposed to be small images so
+       we allow using the mediaSource (unless the url is empty) */
+    val preferredMediaSource = if (mediaSource.url.isEmpty()) thumbnailSource else mediaSource
 }
diff --git a/libraries/eventformatter/impl/src/main/res/values-cs/translations.xml b/libraries/eventformatter/impl/src/main/res/values-cs/translations.xml
index 69179b1276..ecbe8031b9 100644
--- a/libraries/eventformatter/impl/src/main/res/values-cs/translations.xml
+++ b/libraries/eventformatter/impl/src/main/res/values-cs/translations.xml
@@ -39,6 +39,8 @@
   <string name="state_event_room_name_changed_by_you">"Změnili jste název místnosti na: %1$s"</string>
   <string name="state_event_room_name_removed">"%1$s odstranil(a) název místnosti"</string>
   <string name="state_event_room_name_removed_by_you">"Odstranili jste název místnosti"</string>
+  <string name="state_event_room_none">"%1$s neprovedl(a) žádné změny"</string>
+  <string name="state_event_room_none_by_you">"Neprovedli jste žádné změny"</string>
   <string name="state_event_room_reject">"%1$s pozvánku odmítl(a)"</string>
   <string name="state_event_room_reject_by_you">"Odmítli jste pozvání"</string>
   <string name="state_event_room_remove">"%1$s odebral(a) %2$s"</string>
diff --git a/libraries/eventformatter/impl/src/main/res/values-fr/translations.xml b/libraries/eventformatter/impl/src/main/res/values-fr/translations.xml
index f7c12a2028..be8f466aa3 100644
--- a/libraries/eventformatter/impl/src/main/res/values-fr/translations.xml
+++ b/libraries/eventformatter/impl/src/main/res/values-fr/translations.xml
@@ -39,6 +39,8 @@
   <string name="state_event_room_name_changed_by_you">"Vous avez changé le nom du salon en : %1$s"</string>
   <string name="state_event_room_name_removed">"%1$s a supprimé le nom du salon"</string>
   <string name="state_event_room_name_removed_by_you">"Vous avez supprimé le nom du salon"</string>
+  <string name="state_event_room_none">"%1$s n‘a fait aucun changement visible"</string>
+  <string name="state_event_room_none_by_you">"Vous n‘avez fait aucun changement visible"</string>
   <string name="state_event_room_reject">"%1$s a rejeté l’invitation"</string>
   <string name="state_event_room_reject_by_you">"Vous avez refusé l’invitation"</string>
   <string name="state_event_room_remove">"%1$s a supprimé %2$s"</string>
diff --git a/libraries/eventformatter/impl/src/main/res/values-ru/translations.xml b/libraries/eventformatter/impl/src/main/res/values-ru/translations.xml
index 4c1defbb68..7930c496dc 100644
--- a/libraries/eventformatter/impl/src/main/res/values-ru/translations.xml
+++ b/libraries/eventformatter/impl/src/main/res/values-ru/translations.xml
@@ -39,6 +39,8 @@
   <string name="state_event_room_name_changed_by_you">"Вы изменили название комнаты на: %1$s"</string>
   <string name="state_event_room_name_removed">"%1$s удалил название комнаты"</string>
   <string name="state_event_room_name_removed_by_you">"Вы удалили название комнаты"</string>
+  <string name="state_event_room_none">"%1$s ничего не изменилось"</string>
+  <string name="state_event_room_none_by_you">"Вы не внесли никаких изменений"</string>
   <string name="state_event_room_reject">"%1$s отклонил приглашение"</string>
   <string name="state_event_room_reject_by_you">"Вы отклонили приглашение"</string>
   <string name="state_event_room_remove">"%1$s удалил %2$s"</string>
diff --git a/libraries/eventformatter/impl/src/main/res/values-sk/translations.xml b/libraries/eventformatter/impl/src/main/res/values-sk/translations.xml
index 13722a3318..1987a2d333 100644
--- a/libraries/eventformatter/impl/src/main/res/values-sk/translations.xml
+++ b/libraries/eventformatter/impl/src/main/res/values-sk/translations.xml
@@ -39,6 +39,8 @@
   <string name="state_event_room_name_changed_by_you">"Zmenili ste názov miestnosti na: %1$s"</string>
   <string name="state_event_room_name_removed">"%1$s odstránil/a názov miestnosti"</string>
   <string name="state_event_room_name_removed_by_you">"Odstránili ste názov miestnosti"</string>
+  <string name="state_event_room_none">"%1$s nevykonal/a žiadne zmeny"</string>
+  <string name="state_event_room_none_by_you">"Nevykonali ste žiadne zmeny"</string>
   <string name="state_event_room_reject">"%1$s odmietol/a pozvánku"</string>
   <string name="state_event_room_reject_by_you">"Odmietli ste pozvánku"</string>
   <string name="state_event_room_remove">"%1$s odstránil/a %2$s"</string>