Hi!
Thank you for the details, it helps us a lot! I tried to log-in with the details, but unfortunately they did not work.
Can you please check if the wp-content/uploads and wp-content/cache directories exist and are writeable, that should very likely resolve the issue.
The plugin very likely tried to access one or create the cache directory but it may failed.
If that does not work, then here is a permanent solution from the upcoming release, which will resolve this issue. You will have to replace it manually though:
– Open up the /code/wp-content/plugins/ajax-search-pro/includes/classes/Utils/FileManager.php file on your server (you can use the plugin file editor or FTP too)
– Replace it’s contents with this
– Save
Afterwards the warning message will disappear and is permanently fixed.
If you need help with this, then you can add temporary FTP access and I will do it for you.