This issue of SQL Change Automation has been reported in their forum discussion 87146
There you can find the workaround:
unload the project, then modify the connection string from "Multiple Active Result Sets" to "MultipleActiveResultSets" (remove the spaces).
I found the connection string in the [project].sqlproj.user file.
In some project I also had to remove the spaces from "Trust Server Certificate".
For instance, it used to say:
<TargetConnectionString>Data Source=localhost;Initial Catalog=Dbname;Integrated Security=True;Persist Security Info=False;Pooling=False;Multiple Active Result Sets=False;Encrypt=False;Trust Server Certificate=False</TargetConnectionString>
and I manually changed into:
<TargetConnectionString>Data Source=localhost;Initial Catalog=Dbname;Integrated Security=True;Persist Security Info=False;Pooling=False;MultipleActiveResultSets=False;Encrypt=False;TrustServerCertificate=False;</TargetConnectionString>