Warning: include(./pm/inc.sfx.inc): failed to open stream: No such file or directory in /home/peter/www/www/pm_inc.php on line 26

Warning: include(): Failed opening './pm/inc.sfx.inc' for inclusion (include_path='.:/usr/local/php56/lib/php') in /home/peter/www/www/pm_inc.php on line 26
The information is set incorrectly in the following file: "pm_inc.php"
Please open "pm_inc.php" with a text editor and correct the path.
You'll find instructions located inside that file