Microsoft Q&A uses a Web Application Firewall (WAF) to block malicious requests.
When posting, you might receive an error message as illustrated below if the content you are posting contains restricted words such as system file references and URL injection type strings.
We are looking on a long term solution to avoid this error, as well as on an autosave/draft feature that will prevent users to lose their content when encountering this or any other platform error.
In the meantime to verify if your content might get blocked due to certain keywords, before posting make sure you are able to “preview” your post without issues. If not, please modify your content to remove any system references and try to preview again. Once preview works, then you will be able to successfully submit your post.
Note: there are cases that the preview of the message does not show anything but publishing the message works.
💥HIGHLY recommend to all user! Until this issue is fixed, before you submit your message, click on Ctrl+A then on Ctrl+C. This will copy the content of the message to the clipboard. If the message did not submitted well then you can open notepad a new post and click on Ctrl+V in order to paste the content again. This way you will not lose it.