.\PBSPPTimeDelayServer.cpp(234) : error C3861: 'sig_tickExpicit': identifier not found
and
void sig_tickExplicit(const quint64 nNT);
Basically, try to search for one of them and you will not find the other. That usually means, you have made a typo. I think what you meant to write is this (note the missing character 'l'):
emit sig_tickExplicit(nNT[0]);
^