I thought something was wrong but it seems able to post from the website.

When accessing the media. It says. There was a problem when trying to access your media. Please try again later.

It seems like the conclusion of this is to register a new account again on your mobile app. Also tested it on the android wordpress mobile app it seems to work but somehow my iphone wordpress app just doesn’t worm.

Re-registering the same site seems to let me post to my site again