P: Lightroom Web & iOS Error: T20200914

Hey, ​@human.zip. Welcome to the Lightroom Community. I’ll help you figure this out.

Are you working on a iOS 27.1 (beta) as reported here: 

If not, please provide more info about the specific device you’re working on. 

Thanks!
Sameer K

Hey, @MarkusHeinzelmann. Welcome to the Lightroom Community. I'll help you figure this out.

Troubleshooting on a beta operating system might not yield desirable results. Please wait for the general/public release of iPadOS 27 before Lightroom is supported. If possible, roll back to the currently available public release of iPadOS 26 to continue using Lightroom.

Tldr: Beta OS isn't supported.

Thanks!
Sameer K
(Type '@' and type my name to mention me when you reply)

Environment:

• Lightroom for iPad 11.3.3
• iPad Pro 11-inch (M4)
• iPadOS 27 Beta 1 (24A5355q)

Problem:
All cloud-synchronized photos fail to display and open on the iPad.

Symptoms:

• Albums synchronize correctly.
• Image counts synchronize correctly.
• Existing cloud photos appear only as gray placeholders.
• Opening any cloud photo results in error code T20200914 after approximately 2 seconds.
• Lightroom Web works correctly on the same iPad.
• Lightroom on iPhone and Mac works correctly with the same Adobe account.
• New photos imported directly on the iPad display correctly and upload successfully to Adobe Cloud.

Additional verification:
A new album and image were created on an iPhone after the issue started.
The album synchronizes to the iPad.
The image appears only as a placeholder and cannot be opened.
Error T20200914 is displayed.

Troubleshooting completed:

• Sign out/in
• Clear cache
• Reinstall Lightroom
• Restart device

Conclusion:
Cloud synchronization itself is functional.
The issue affects downloading or rendering cloud image data on iPadOS 27 Beta 1.

Error code: T20200914, No older photos are open in lightroom ios app, and I can’t find my saved presets. Also new photos after editing is not sync in the library. 

Error code: T20200914, No older photos are open in lightroom ios app, and I can’t find my saved presets. 

Yes. The issue is also on the lightroom.adobe.com website, not just the app. 

I am having the same issue. Everything was fine this morning and it started happening this afternoon. I did everything possible. Delete and redownload mobile. And updated lightroom on my computer. I made sure to check on lightroom web and it says “error rendering file”. I can only see them on my lighroom desktop… I have tried everything. I have ample amount of storage and my files are not corrupt. I’m not sure what’s going on. 

You have posted in the Lightroom Classic forum but your question is not about Lightroom Classic. You will get better help by posting in the Lightroom (Ecosystem) forum.