500 Error When Plugin is Enabled

Some additional information…

I don’t recall doing anything out of the ordinary in the days leading up to experiencing the problem… I created some draft posts/pages, updated some plugins. That’s pretty much it.

I did some additional testing. I deactivated all of the plugins I’m using. Then I reactivated only Ultimate Appointment Scheduling. The 500 error appeared.

Next I deactivated Ultimate Appointment Scheduling and reactivated all of the other plugins I’m using and there was no 500 error.

Next, I remembered that I added an appointment in which the phone number was a Russian number. I thought maybe that the non standard US phone number format (even though I’m pretty sure there is no format for the phone number) or the + for the country code was causing the problem, so I edited the appointment, directly in the database, and removed the phone number. 500 error remained.

I think there is one more thing I need to test… trying a different theme, like Twenty Seventeen. I’ll do that at my earliest convenience and report back what I find.

But I hope you’ll look into this soon. I currently have the Ultimate Appointments plugin deactivated so that I can access the admin area of my site. But I’d really like to get this plugin turned back on soon.

Thanks,
William

Hmm, that’s interesting. I deleted the appointment that had the odd phone number, which I had previously deleted from the record. There weren’t any suspicious characters in any of the other fields that I recall. But, deleting that record fixed the issue.

Thanks,

William