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Uncaught wfWAFStorageFileException: Unable to save temporary file for atomic writing.
in /home/sta/public_html/wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php on line 34

Call stack:

1. wfWAFStorageFile::atomicFilePutContents()
   wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php:658

Warning: Undefined array key "file" in /home/sta/public_html/wp-content/plugins/query-monitor/dispatchers/Html.php on line 1021

Warning: Undefined array key "line" in /home/sta/public_html/wp-content/plugins/query-monitor/dispatchers/Html.php on line 1021

2. wfWAFStorageFile::saveConfig()