The WPFTS Pro version you are using is very outdated. Please consider upgrading to 2.46.x which is the latest. It has a completely new indexing and searching algorithm and it should solve your issue.
Multi word search showing an empty screen
We are experiencing an issue with the pro version of the plugin where we can search for a single word, but multi word searches show a blank screen. See the examples below:
Can you please help us resolve this issue for our client?!
It looks like an out-of-memory situation. Sometimes WPFTS Pro requires a bit more memory to work than usual, so I would recommend switching your memory_limit option (in php.ini) to 512M at least.
Please try this and let me know if it helped or not. Thanks!
Thank you, that worked. We appreciate the help!