When upgrading the Simple Site Info module version 3.6 to 3.8.0 on multiple
sites I often get a white screen and if I go back to MM an "This module is
awaiting upgrade" message. Hitting upgrade in the overview will upgrade without
any problems.

[Thu Sep 10 13:21:59.353874 2026] [proxy_fcgi:error] [pid 575592:tid 575648]
[remote ******************] AH01071: Got error 'PHP message: PHP Fatal error: 
Uncaught Error: Undefined constant SimpleSiteInfo::MANAGE_PERM in
/home/username/domains/domain.nl/public_html/modules/SimpleSiteInfo/method.upgrade.php:58\nStack
trace:\n#0
/home/username/domains/domain.nl/public_html/lib/classes/class.CMSModule.php(1110):
include()\n#1
/home/username/domains/domain.nl/public_html/lib/classes/class.moduleoperations.inc.php(889):
CMSModule->Upgrade()\n#2
/home/username/domains/domain.nl/public_html/lib/classes/class.moduleoperations.inc.php(941):
ModuleOperations->_upgrade_module()\n#3
/home/username/domains/domain.nl/public_html/modules/ModuleManager/lib/class.modmgr_install_helper.php(102):
ModuleOperations->UpgradeModule()\n#4
/home/username/domains/domain.nl/public_html/modules/ModuleManager/lib/class.modmgr_install_helper.php(86):
modmgr_install_helper::execute_module_action()\n#5
/home/dolleman/domains/domain.nl/public_html/modules/ModuleManager/action.installmodule.php(54...',
referer: https://domain.nl/