You have included content in your post that is not permitted.

Some of the things that may be removed (from experience):

personal information

not a technical question

some words that trigger the post to be checked for content

Not sure what to tell you since we are all other users here and are not privy to the mods' criteria.

Try to remove or change some words.

You probably have a character or characters that are triggering that. Due to past spamming of the site certain language characters, words, etc. are prohibited. If you are posting diagnostic logs this can also trigger that message.

And sometimes it is a bug in the forum software. I get those occasional when I've typed nothing improper. I log out, log back in and it is usually gone. It's been worse for me this week.