My editor isn’t loading properly after the update… any idea what the problem is?

My editor isn’t loading properly after the update… any idea what the problem is?

My nav menu also seems to open on mobile at all times now.
Hello @dannycort,
Thanks for asking. 
Please follow up the steps below:
.htaccess-bak. Then in WP Admin Menu, go to Settings > Permalinks and just click the Save Changes button.If you still have problems kindly get back to us with the result of the steps above and URL/User/Pass of your WordPress dashboard using the Secure Note functionality of the post to follow up the case.
Thank you.
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