error in real work in v7.0.5

When a ressource try to enter some real work it send an error and on log file it's write:

2018-04-24 18:27:13.679 ***** ERROR ***** [V7.0.5] ERROR *****
2018-04-24 18:27:13.679 ***** ERROR ***** [V7.0.5] on file '/var/www/projeqtor/tool/saveImputation.php' at line (40)
2018-04-24 18:27:13.679 ***** ERROR ***** [V7.0.5] cause = Undefined index: nbLines

do you have an idea ?

When I try to enter real work in my account everything it's ok.
when I try to enter real work for the ressource who have this problem with my account it's OK

problem it's only when the ressource is logged with his account.