page not found when trying to do updates in multisite

Hi team!
So this is odd, started a couple days ago. When I try to run updates on my wp multisite, I am not able to.

example: go to -> http://mydomain.com/wp-admin/network/update-core.php and get a page not found.

example: click on the update button on admin toolbar, same url, same result (go figure! lol)

example, from my dashboard: http://mydomain.com/wp-admin/network/ select updates > available updates it just spins and spins eventually failing. never connects.

example: from my dashboard: http://mydomain.com/wp-admin/network/ select plugins > installed plugins (well yesterday it gave me a list of plugins and I was able to update from that list) today it just spins. doesn't connect. eventually page not found.

Any ideas?