Warning: Attempt to read property "libdir" on null in C:\Apache24\htdocs\moodle\question\bank\usage\classes\tables\question_usage_table.php on line 20

Warning: require_once(/tablelib.php): Failed to open stream: No such file or directory in C:\Apache24\htdocs\moodle\question\bank\usage\classes\tables\question_usage_table.php on line 20

Fatal error: Uncaught Error: Failed opening required '/tablelib.php' (include_path='.;C:\php\pear') in C:\Apache24\htdocs\moodle\question\bank\usage\classes\tables\question_usage_table.php:20 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\question\bank\usage\classes\tables\question_usage_table.php on line 20