I am getting an intermittent 500 error message when editing content
PHP Warning: Directory C:/inetpub/wwwwroot/cms/log/cache/htmlpurifier not writable, please alter file permissions in C:\inetpub\wwwroot\cms\vendor\ezyang\htmlpurifier\library\HTMLPurifier\DefinitionCache\Serializer.php on line 302
but it’s weird, it only crops up occasionally. Note that IUSR has full permission on the logs and vendor dirs