1 user cannot connect anymore

Hi,

One user of our projeqtor plateforme (abonnet) can not log in since yesterday. He was working on planning of one project. Every other users can log in to the plateforme without any problem.

=> version of ProjeQtOr : 9.02
=> browser used (en version) : Chrome, Safari (the user tried different browers from different machines, allways the same result)
=> use case to reproduce the issue (step by step case) :

1. Our user connects (id+mdp) ok
2. Immediat error message : "Connexion lost. Please log in again" 

=> expected behavior and noticed behavior : this user not to be disconnected
=> attach print screen to illustrate behavior 
=> attach log file (or at least copy lines with "ERROR") : I replaced IP adress with XX.XXX.XXX.XXX. This error message occures each time the user abonnet tries to log in.2021-01-27 13:57:28.733 ===== TRACE ===== NEW CONNECTED USER 'abonnet'
2021-01-27 13:57:34.933 ***** ERROR ***** [V9.0.2] HACK ================================================================
2021-01-27 13:57:34.933 ***** ERROR ***** [V9.0.2] Try to hack detected
2021-01-27 13:57:34.933 ***** ERROR ***** [V9.0.2] Source Code = period scale 'monthfromodaytrue' is not an expected period scale
2021-01-27 13:57:34.933 ***** ERROR ***** [V9.0.2] QUERY_STRING = scale=month?fromToday=true&idResource=27&idOrganization=&idTeam=&periodType=month&periodValue=202102&yearSpinner=2021&monthSpinner=2&showAdminProj=
2021-01-27 13:57:34.933 ***** ERROR ***** [V9.0.2] REMOTE_ADDR = XX.XXX.XXX.XXX
2021-01-27 13:57:34.933 ***** ERROR ***** [V9.0.2] SCRIPT_FILENAME = /var/www/html/report/globalWorkPlanningPerResource.php
2021-01-27 13:57:34.933 ***** ERROR ***** [V9.0.2] REQUEST_URI = /report/globalWorkPlanningPerResource.php?scale=month?fromToday=true&idResource=27&idOrganization=&idTeam=&periodType=month&periodValue=202102&yearSpinner=2021&monthSpinner=2&showAdminProj==> copy errors displayed on browser console : no error, just disconnection of the user.