Same here, I installed it on 4.2.0 and the Thanks button doesn't show, on 4.1.3shows fine

I'm running this add on, on 4.2 pl2 and it works a treat :)

Did you use Hippy's fix or ForceHSS's fix?

I'm using Hippy's fix, I wouldn't be sure what the difference's are though :)

I woke up that morning, had coffee, went into my office to get on my computer, checked email and stuff, then logged onto my forums, checked for new posts, read a few, and on one of them I simply clicked the 'Thanks' icon. That's when the error occurred.

That's not much of a bug report. Now tell us how many different browsers you've tried, how many of your members are reporting the same error, and what you've already done to try to solve the problem. And, assuming it happens every time in 3-4 browsers, give us a test login so we can see it for ourselves. At some point be prepared to assure us that you have disabled all your other mods, and that it didn't stop working after installing another mod.

Please re-read my original post, slowly so as to fully comprehend all the aspects and limitations of reporting the issue (hint: happened once, fixed itself), and you'll see why there's really nothing more I can say about it than I already did.

All I want to know is if this is something that has a known cause, and how to prevent it. If not, so be it.

Are you using Hippy's or my version

Yours.

Did it ever tell you what the error was or was this the only message you ever got