/usr/share/request-tracker4/ is in rt4-extension-customfieldsonupdate 1.02-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/request-tracker4/plugins/
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/html/
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/html/Callbacks/
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/html/Callbacks/CustomFieldsOnUpdate//
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/html/Callbacks/CustomFieldsOnUpdate/Ticket//
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/html/Callbacks/CustomFieldsOnUpdate/Ticket/Update.html//
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/html/Callbacks/CustomFieldsOnUpdate/Ticket/Update.html/AfterWorked
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/html/Callbacks/CustomFieldsOnUpdate/Ticket/Update.html/BeforeUpdate
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/lib/
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/lib/RT/
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/lib/RT/Extension/
/usr/share/request-tracker4/plugins/RT-Extension-CustomFieldsOnUpdate/lib/RT/Extension/CustomFieldsOnUpdate.pm