@manuboss Parse Line (deprecated) - doesn't mean it's unusable, it's still usable if you want.
Or you can use an alternative method called "Parse CSV string"
You asked this question, I think you are new, and the message cannot tell you all about your problem, because there is a lot of information as well as different use cases.
So you can follow the basic instructions.
Open another project in BAS
Open the project file in the tax editor and use search (CTRL + F) to find <Module Name="CommonCode">
Delete the found line, if there are no other modules besides CommonCode, then completely replace <Modules>...</Modules> with <Modules/>
Save the file
Open the project in BAS a new one, via Project -> Open.