Mysterious "barcode" error during compilation

You need to wait until is released or if you are a tester:

happy to test but i’m not a tester, you can send me a direct link to pkstys@gmail.com

You need to contact Xojo at hello@xojo.com and ask to be a tester.
I think you need a current license and reported Issues in the past.
They will tell you more about the requirements.

understood, but i don’t have time to sign up etc. Xojo can send me a direct link and i’ll test.

Xojo will not do that. In your case you will need to wait for the release.

ok then