If a question is based on a misapprehension then I think it is fair to close it as a duplicate of a question that explains the physics involved.
In this case a Q/A explaining what physicists mean by imaginary time is not strictly speaking an answer to the question Is imaginary time a fifth dimension?, but it answers the question indirectly by explaining imaginary time. That makes it a good candidate to be linked as a duplicate.
In this case flagging the duplicate worked, as I note the OP posted in a comment:
Ok, I think I'm starting to get it. Imaginary time is the result of a transformation applied to time that makes it act like a spatial dimension mathematically. Imaginary time and "real time" aren't two coordinates of a complex number, they're just two different ways of looking at the same thing?