Website URL
(please specify the URL of the site on which you are experiencing the problem)
https://sebul.sarang.net/BB/
Error Message
(please share the FULL error message you see, if applicable)
General Error
Illegal use of $_SERVER. You must use the request class to access input data. Found in /var/www/errors/override.php on line 56. This error message was generated by deactivated_super_global.
BACKTRACE
FILE: (not given by php)
LINE: (not given by php)
CALL: msg_handler()
FILE: [ROOT]/phpbb/request/deactivated_super_global.php
LINE: 67
CALL: trigger_error()
FILE: [ROOT]/phpbb/request/deactivated_super_global.php
LINE: 87
CALL: phpbb\request\deactivated_super_global->error()
FILE: /var/www/errors/override.php
LINE: 56
CALL: phpbb\request\deactivated_super_global->offsetGet()
FILE: [ROOT]/includes/acp/acp_php_info.php
LINE: 39
CALL: phpinfo()
FILE: [ROOT]/includes/functions_module.php
LINE: 676
CALL: acp_php_info->main()
FILE: [ROOT]/adm/index.php
LINE: 81
CALL: p_master->load_active()
Other Information
(other information and details relevant to your question)
please refer
https://www.phpbb.com/community/viewtopic.php?t=2652157