Welcome @EduardoSilva Happy you are here
Considering you are using PHP I believe this is a PHP sessions issue. Just run as sudo user:
$ rm -f /var/lib/lsphp/session/lsphp71/* && rm -f /var/lib/lsphp/session/lsphp72/* && rm -f /var/lib/lsphp/session/lsphp73/*
$ rm -f /var/lib/lsphp/session/lsphp74/* && rm -f /var/lib/lsphp/session/lsphp80/* && rm -f /var/lib/lsphp/session/lsphp81/*
$ for version in $(ls /usr/local/lsws|grep lsphp); do echo ""; echo "PHP $version"; session_time=$(/usr/local/lsws/${version}/bin/php -i |grep -Ei 'session.gc_maxlifetime'| grep -Eo "[[:digit:]]+"|sort -u); find -O3 "/var/lib/lsphp/session/${version}" -ignore_readdir_race -depth -mindepth 1 -name 'sess_*' -type f -cmin +$((session_time / 60)) -delete; done
## get a cronjob to clean your php sessions
$ sh <(curl https://raw.githubusercontent.com/tbaldur/cyberpanel-mods/main/cyberpanel_sessions_cronjob.sh || wget -O - https://raw.githubusercontent.com/tbaldur/cyberpanel-mods/main/cyberpanel_sessions_cronjob.sh)