Drupal 7.x

Hi all, 

I have a taxonomy view set up and for one term I am getting the following error using the Views Show More Pager:
An AJAX HTTP error occurred.  HTTP Result Code: 200 
Debugging information follows:
Path: /views/ajax
StatusText: OK
ResponseText:

That's all, no other error and no error in the logs.  The only recent change is that Drupal was updated to 7.72.

The page is here: https://bestpsychicdirectory.com/newyork

I came into an existing Drupal 7 site as admin.

Now I saw that someone is using this website for spamming. It seems he's using the contacts form... but I don't know how. The logs/mail.log contains many entries like that:

Wherever you see:

"If "Custom", see the PHP manual for date formats. Otherwise, enter the number of different time units to display, which defaults to 2"

The "PHP manual" URL has changed. 

It's now located at: https://www.php.net/manual/en/datetime.format.php

Don't know where to report this. If you do, please pass it on.

We have about 50 schools in our school district. Right now, all school sites are currently running in a Drupal 7 multi-site installation. I had hoped to migrate everything over to the new Drupal 8/9 platform and Domain Access but from testing Domain Access over the last few months, I'm afraid it might not be the right approach.

Can anyone advise how we might look to deploy new sites running in Drupal 8/9?

Hello, colleagues. Do any of You use Drupal 7 and Git? I am looking for a solution that will allow Drupal 7 users to upload their files to the repository using an SSH key, and the git repository assigns rights to users. Installed the module https://www.drupal.org/project/git but it contains errors and partially doesn't work. Please tell us about your experience.