Steps to reproduce:

1. Ask a question
   
2. When you get an answer, click the "Thank" button in the top-right corner of the post.

Expected outcome: Member gets "thanked" for answer.
Actual outcome: "Error Occurred".

Any chance you could fix this?

I got the same error a few minutes ago, then I clicked a few other buttons on the post that I expected would do nothing, then went back and clicked 'Thank' and the mentor's thank count increased by one and I received no error.