Cannot Evaluate Expressions while debugging in Netbeans 8.1 (PHP)

Question

I'm using the XDebug tool for my PHP files in Netbeans 8.1. While debugging, the "Debug > Evaluate Expression" option is disabled. Does anyone know how to enable this?

I've already gone into "Tools > Options > PHP > Debugging" and checked "Watches and Balloon Evaluations".

Answer 1

I have same problem, it seems like a bug, it is always disabled.