Cannot create a post or update a post- doesn't load

I am both trying to submit a post to a community and edit a post I have already made. When clicking "create," the wheel just spins indefinitely, I have waited for over half an hour and there is no change, reloading does nothing. I am able to load communities and make some other posts though (like this one) so it's not an internet issue.

Update: The post edits could only be made by adding a paragraph or two at a time. There's either a hard or soft character limit. I had to add the rest in comments. As far as posting to the community, I couldn't get that to work at all. I messaged the moderator to ask. Maybe it's a permissions issue..