I took a look at the sys info. It looks fine with the exception that the PHP and MySQL versions are, really, really old. I would recommend asking your host if it is possible to meet the recommended requirements for WordPress rather than the legacy minimum requirements.
Now, that said, I am at a loss as to why editing pages would be an issue because Connections does not even load any assets on those page admin pages.
I’d be willing to take a closer look. I’ll need both a FTP login and a temp WP admin login to debug. The details can be posted here as a private reply.