UI Extensions Quick Start Guide Failed to upload project files

I’m following the guide posted here.

On the third step I get the error below. Can you give me any suggestions for troubleshooting?


sad face

Hi @AMichaels,
Thank you for reaching out to the Community!
Have you opted in for this “UI Extensions quickstart guide” Beta, please? Because this may be the reason why you are seeing the error.
Also, are you a Super Admin?
I’d like to invite a couple of subject matter experts and Community Members to this conversation: Hi @Bradley_B, @VladT, @Sambo and @zach_threadint do you have suggestions to help @AMichaels, please?
If anybody else has anything to add and/or share, please feel free to join in the conversation :slightly_smiling_face:
Thanks a lot and have a great day!
Best,
Bérangère

Thank you - I had not opted in to the Beta, that solved the issue. I appreciate the reply.

Hi @BérangèreL, which beta should I opt into or request to be able to start working in UI Extension. I am also getting the same error

I have this error too.
How do you resolve this error? Could you let me know your solution?

I opted in for this “UI Extensions quickstart guide” Beta and that resolved the issue.