did not find expected tag URI, why it happens?

[MohamedXi]

I encounter an error that I can't solve.
Have any of you encountered this error?

yaml: line 9: did not find expected tag URI

I have not changed anything.

[rowanparker]

This happened to me too. It was a Docker issue.
Go into Settings > Experimental Features and disable Use Docker Compose V2 release candidate.