I’m very sorry. Clearly, I am not very technical. Here is everything I know:
I was one of the people who got the 3.0.0 update which is when the problems began. This was fixed by following your instructions here:
https://www.ads-software.com/support/topic/my-calendar-3-0-0-bug/
My dev did this for me. I think that I was on 3.0.4 at that point. I installed the updates as you made them available. I no problems until 3.0.8
With 3.0.8 active, I had some users email me to tell me they could not access my site. 503 error? I ignored this, but soon after, I saw the error in forum, screen shot above.
I decided to try the plugin detective which I’ve never used. It would not load unless I deactivated the calendar. I gave it a rest after that.
I activated the calendar this morning, intending to not use the admin bar in simplepress that I know causes an error. I do not need, Plugin Detective. I wanted to see if anything else would turn up since I unsure if the complaints from the users were related. It was 4 am in the morning – slow traffic.
I was messing with wordfence, blocking ips. I have a list of blocked ips, in affect for about a year. All the sudden, the list was gone. It showed that no ips were blocked on the site. Please note the calendar was active for some time before this happened. Thirty minutes at least. I was working with the list; editing it.
Seeing the list disappear, I assumed someone was on the site with me but ultimately, as soon as I deactivated the calendar, the blocked ip list was back and the site has been stable since.
In regards to restoring the prior version, it won’t install because the other version is still on the site? If I delete 3.0.8 will the data be deleted as well? Is there anything I can do to help you solve this?