See https://community.intersystems.com/post/diagnosing-cause-errors for tips on finding out more about what's causing <PROTECT> errors.

Are some classes in a package that is mapped to a different database that you don't have WRITE permission on?

@Sorin Fratila you may like to point your BE colleagues at this recording of a Developer Community webinar I co-presented last May titled "Enterprise Grade Source Code Management"

https://youtu.be/iVxTu_jPHBg