Your system is being updated. Please refresh again after a few moments not solved issue

i have this problem
Your system is being updated. Please refresh again after a few moments
and iam try this : iam try most things in previous article
1 ) bench update and i get this error :
bench.utils.CommandFailedError: git pull

  1. bench --site sitename migrate and i get this error :
    ModuleNotFoundError: No module named ‘frappe.real_state’

  2. i set maintenance mode":1 to 0 and i still have same error

can any body help me to solve this issue ?

Investigate why git pull is failing, For all your apps directory, do git pull and see if it works.

Do you have a real_state module?

This is not a core app. Try removing it and continue. Once setup is completed bring it back.

removing?