Thank you for your help. The problem is, yes, solved. :-)

I still have the date stamp problem but I will input the patch code you provided later when traffic is low and see if it works.  

I love this forum plugin and this helpful community. Many thanks to Robert and Sophy, and also Cris, Varek, and Anton. 

I've just checked and didn't find any issue with pagination. I'm a guest on your forum and I see pagination here: https://www.jeannemayell.com/community/your-suggestions-for-improvement/as-possible-forum-sections-how-about/

Please let me know, if this is a topic specific issue or a general? Where can i see the problem?

Robert, i can also send you privately dashboard login info if that I will help but need your email info.  I will work on everyone's helpful suggestions today.  

So far I have gone to the debug section of the forum and under Database Problems it listed about thirty lines of problems in red.  I clicked on the box that says it will solve the problems, and almost instantly the screen said that there no database problems.  (maybe it fixed them?).  Then I clicked on Other Errors and Issues and it also said there were no problems.  (I want to tell you that I hadn't realized that wpforo had such a great set up for debugging problems.) Then I deleted the cache.  

As for the patch you provided for solving the data stamp issue (thank you Verek for sending me there and thank you Robert for providing it), I will have to wait until late at night eastern time when my traffic is low to try the patch.  

Please leave your forum URL to allow us check it.  Make sure you've delete all caches. And please navigate to Dashboard > Forums > Tools > Debug admin page, check database problems in Tables Tab then other errors in Errors & Issues Tab.

Fix for the time stamp issue: https://wpforo.com/community/how-to-and-troubleshooting-2/my-forum-is-stuck-on-the-dd-mm-yyyy-date-format/#post-28945

I also inputed the codes that Cris suggested into Styles and it had the effect of breaking the threads completely for guest users. I use Avada child theme and perhaps it did not work because of that. You could see the main layout of the forums and topics, but when you clicked on a topic, the old structure of extended layout had disappeared and the page was clearly broken.  

So I removed this new code and saved the change and at first the problem remained.

So that's when I clicked all the buttons in the forum maintenance section of the forum dashboard. The threads now look okay again for guest users but now the time is in international format. 

Is there a way to fix the time format? 

P.S. I also checked the wp for error logs and it said there were no errors detected currently .