The Matomo configuration file is not writable

I cannot access my reports. I get critical error.

In my logs:

			  # Errors
  • Error Matomo System Check: Failed to run Matomo system check. (The Matomo configuration file (config/config.ini.php) is not writable, some of your changes might not be saved. Please change permissions of the config file to make it writable.)

HELP ME PLEASE!