We have to update the Publish page to give user the error message so they know what must be changed. This is planned but we have not found the time to work on this yet.
For you problem usually this is for an additional SPACE at the end of the tags, let me know ;)
Good to know. Another scheduling tool accepted it fine. I'll keep this in mind the next time there's a problem. (Hopefully never).
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit