“error MSB6006: “cmd.exe” exited with code 3.”
Is this coming from Qt? If so can anyone provide a short description on what / how to install it?
Apparently.
I have editor project disabled, since
a) Qt does not provide 32-bit binaries for VC11
b) Editor is an useless stub
I’d suggest doing the same, unless you’d like to on it.
If that’s the case, please paste the full output log. There should be a clue somewhere. 
"I have editor project disabled, since
a) Qt does not provide 32-bit binaries for VC11 "
Same findings here: Only 64 bit binaries for VC11. I will keep it also as disabled.
I managed to build 32 bit Qt 5 VC11 binaries myself… it wasn’t that hard. Anyway it’s not worth it unless you want to improve it.