Fixing the PowerApps ‘BlobNotFound’ attachments error
The attachments download feature in PowerApps may stop working and return a BlobNotFound error. This issue is related to a new formula bar that sets the 'on click' value to Id instead of the file uri. To fix this problem, you need to enable the retired feature 'Legacy formula bar' and change the Value setting to AbsoluteUri. After making these changes, the attachments will be downloadable again. Alternatively, you can replace the attachments view mode with a gallery by adding a gallery, building the link to each file, and downloading it using a custom clickable control.
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