It's great to hear that the refresh button is working well for you most of the time! Indeed, hitting the refresh button can be helpful in resolving software errors like the "unable to post" warning.
When you encounter this error message, hitting refresh on your browser essentially reloads the webpage you are on, including all the necessary scripts and resources needed for posting your message. This can often address temporary issues or glitches that prevented your message from being posted initially.
So, if you receive the "unable to post" warning, simply click the refresh button on your browser once or twice. This will allow the webpage to reload and give it another attempt at posting your message. In many cases, this should resolve the error and your message should be successfully posted.
Remember, if the error persists even after refreshing, it could indicate a more significant issue, such as a problem with the website or your internet connection. In such cases, you may need to reach out to the website's support team for further assistance.
Keep in mind that while hitting refresh can often solve these kinds of errors, it is always a good practice to save any important content before attempting to post, just in case. This ensures that you don't lose any valuable work in case there are persistent issues.
I hope this explanation helps you understand how to address the "unable to post" warning more effectively.