Browser identified jqmirgrate error … now what?

Here’s my site. As you can see it is working but ALL of my plugins are not.

Updated to 4.5. Already had to contact my host to change permissions so that I could edit/add/remove.

Now My Dashboard indicates all of my plugins are both active and inactive.

Ran troubleshoot from browser via Main Post suggestion. Here’s what I got:
Some google font errors like “https://fonts.googleapis.com/css?family=Open%2BSans%3A300italic%2C400italic%…xt%2Cgreek%2Clatin-ext%7CDroid%2BSans%3A400%2C700&subset=latin%2Clatin-ext Failed to load resource: the server responded with a status of 400 (Bad Request)”

AND

JQMIGRATE warnings:
JQMIGRATE: jQuery.event.handle is undocumented and deprecated
jquery-migrate.js?ver=1.4.0:47 console.trace()migrateWarn @ jquery-migrate.js?ver=1.4.0:47

JQMIGRATE: jQuery.fn.size() is deprecated; use the .length property
jquery-migrate.js?ver=1.4.0:47 console.trace()migrateWarn @ jquery-migrate.js?ver=1.4.0:47

JQMIGRATE: jQuery.fn.live() is deprecated
jquery-migrate.js?ver=1.4.0:47 console.trace()migrateWarn @ jquery-migrate.js?ver=1.4.0:47

Not sure what to do next b/c it doesn’t match with the syntax error fix in the Main Post. I’m semi-literate in code so may need simplified instructions.