What specifically is this Error caused by?

Hello everyone,
I started a UI today and one of the bindings in the UMG gives me this error.
TotalGold is set up in the Player with a function PickedUpGold. No idea where, but I am definately doing something wrong.!

What error?

Please try changing the type of GoldValue in alex from a float to a boolean. Then save and compile. Then change the type back from a boolean to a float, fix any links that got broken while it was a boolean, and save and compile again.

That worked, thanks!!!

Great! If you would click the checkmark next to my answer to accept it, that will help others know this has already been resolved.