Those who were using https://stemgeeks.net to post were having issues uploading images after the move to Hive. We just received a fix for it and deployed it.
From my testing, I can see it fixed the issue. If you are still having this issue when posting from https://stemgeeks.net please let me know.
This problem only happened if you were using Hive Keychain, if you were logging in with a posting key there shouldn't have been any problems.
If you see anything else going on, let us know.