I log into wordpress, go to the page on the site I want to edit and hit the upfront edit button, and it spins on certain pages. Below is a list of some pages that I found this on. This was happening before I updated, just thought it needed to update, and it didn't fix it. Tired disabling all plugins and that didn't help.
Contact us - page its fine sometimes, others it doesn't load.
Home Page - Loads fine.
About us - Never loads.
Events - Never loads.
If anything is unclear let me know. Hope this helps fix this issue.