Today the AL Language extension has been updated to 2.0.48254 and with that version I get this error when I try to publish an extension to the Microsoft cloud sandbox.

It's the same error that I got when installed the AL Language extension delivered with the RC3 (2.0.43900) and that I solved reinstalling the version 0.16.19969 and disabling the new one.
I need to get a new Sandbox or is there another solution ??
Regards.
May be this link will be helpful
https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-developing-for-multiple-platform-versions
And also Steven Render's blog
Ok, problem solved.
Thank you all @SirBETE and @AmolSalvi
Regards.
Even I face this problem after installing AL extension and but above post and Steven Render blog help me
Welcome @ftornero9