I located this issue, after disabling @AQB Soft Black List module, the site now runs fine on the RC2 update.

Got error 'PHP message: PHP Deprecated: Creation of dynamic property BxQuoteOfDayConfig::$CNF is deprecated in /var/www/vhosts/somewebsite.com/httpdocs/modules/boonex/quoteofday/classes/BxQuoteOfDayConfig.php on line 19; PHP

message: PHP Deprecated: Creation of dynamic property BxQuoteOfDayConfig::$_aGridObjects is deprecated in /var/www/vhosts/somewebsite.com/httpdocs/modules/boonex/quoteofday/classes/BxQuoteOfDayConfig.php on line 34; PHP

message: PHP Fatal error: Declaration of AqbBlackListsModule::serviceGetMenuAddonManageToolsProfileStats() must be compatible with BxBaseModGeneralModule::serviceGetMenuAddonManageToolsProfileStats($iProfileId = 0) in /var/www/vhosts/somewebsite.com/httpdocs/modules/aqb/black_lists/classes/AqbBlackListsModule.php on line 139'