[Konstantinos]

Those two are not related. The run time error is here:

pawn Code:

new fuerza = JugadorInfo[issuerid][jFuerza];
if(issuerid != INVALID_PLAYER_ID){

You need to make sure that issuer is a valid player BEFORE accessing JugadorInfo array.

The crash is caused from fixes2 plugin. All I can do is suggest another timerfix plugin: https://github.com/udan11/samp-plugin-timerfix/releases