Hi Alex,
Unfortunately, we’re not able to replicate this on our end.
Could you please enable WordPress’s debug mode and log (https://www.ads-software.com/support/article/debugging-in-wordpress/) and then make the error happen again? Does it give a more descriptive error this time (hopefully with reference to a specific file in our plugin)? Could you also check the log to see if there are any entries related to/at the time the error occurred, and forward that section to us?
You can keep WP_DEBUG_DISPLAY set to false so the log entries do not display on your website, if that would help.
