Uncaught Exception: Unable to save temporary file for atomic writing.
in /usr/home/mw2pc4j14q/www/htdocs/wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php on line 34

Call stack:

1. wfWAFStorageFile::atomicFilePutContents('/usr/home/mw2pc4j14q...s/config-livewaf.php', '<?php exit('Access d...me";i:1765309373;}}}')
   wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php:658

Warning: Undefined array key "file" in /usr/home/mw2pc4j14q/www/htdocs/wp-content/plugins/query-monitor/dispatchers/Html.php on line 1021

Warning: Undefined array key "line" in /usr/home/mw2pc4j14q/www/htdocs/wp-content/plugins/query-monitor/dispatchers/Html.php on line 1021

2. wfWAFStorageFile::saveConfig('livewaf')