System.BadImageFormatException caused by NUnit project

Question

Good day everyone. I have been having the same problem all day at work and am struggling to find any new paths to go down.

I am getting the following error when my

Answer 1

For me, the exception was caused by invalid /process=single argument of nunit. If I change the value, then the exception is gone:

/process=separate

or

/process=multiple

p/s: late answer, but just for reference..