Please try it.
Make sure, first, to take a backup.
bench setup requirements bench update --reset bench update --patch bench build bench clear-cache bench migrate
Looks like a permission issue. Open chrome inspect, and you will see the file loading error.
unfortunately it didn’t work but please i have a question why when i make bench update it delete the custom fields i make in items doctype
I’m using Firefox however i open it but there is no error in the loading file