thanks to dear member @anne updated WHMCS nulled callback removed with a new update entry:
changelog
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changelog
Full changelog in here https://docs.whmcs.com/Changelog:WHMCS_V8.8.0_RC_1
Maintenance
CORE-17885 - Improve handling of .jpeg logo
CORE-17886 - Correct documented name for parameters of hook AfterModuleChangePassword
CORE-18673 - Improve OpenTicket API admin parameter description
CORE-18678 - Correct adding addons for multiple instances of same product in admin order
CORE-18688 - Correct IntoDNS URL
CORE-18698 - Prevent error in PHP 8.1 when AutoTerminationDays is not defined...
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