TSD01261: The syntax check failed 'Incorrect syntax near ].' in the batch near '] '

Problem: Database Project fails to build with warning: The syntax check failed 'Incorrect syntax near ].' in the batch near ']. Project also fails to show the exact location of the error:

Source of the Problem:
I've found this to occur when the following two things happen together:

1. You have a variable defined for the project that isnt set.
2. You are using an ALTER AUTHORIZATION ON DATABASE statement with this variable.
   

Fix:
As you would expect, the fix here is to set the variable correctly since the real problem here is that visual studio doesn't tell you where the problem is occurring.