Unable to communicate back with site to check for fatal errors

hi, so i install virtualmin on my vps and then install wordpress on it, i have backup from my old cpanal and restord it, now when i’am trying edit wordpress header from theme editer but i get this error “Unable to communicate back with site to check for fatal errors”
also i can edit file like css but not php

and look like script does not work

There are a variety of plugins reported to cause this issue, including:

  • Magic Fields
  • WP Spamshield
  • GeoDirectory
  • Social Login WordPress Plugin – AccessPress Social Login Lite
  • Ninja Popups for WordPress
  • Custom firewalls or security rules
  • Some custom themes
  • ShortPixel Optimizer
  • WP Server Stats

See https://wpengine.com/support/php-editor-errors-wordpress-4-9-higher/

i do’t have any

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