Any ideas on causes for a subsite to just begin forcing "https" connections out of the blu

Hi folks,

Any ideas on causes for a subsite to just begin forcing "https" connections out of the blue?

Just began happening and was not before (last fine yesterday). It is only doing it on one subsite. Also, I deactivated all plugins on that subsite and it still had the issue as well...

Only plugin updates recently are attached...

Let me know what I can look for to fix...it should not be https at all for any reason (http only)...