Ebay has ran several updates and when they do it is not uncommon for them to lose data. This is most likely the issue however they also changed the listing duration for fixed price 30 day to gtc and this could be the reason. They may have also made changes to item specifics for the category you were listing in and since the draft had wrong info it could not be completed. Regardless the cause was most likely from them pushing a rushed update that was not tested and implemented properly as they usually do. Any time you run into odd issues it is good to keep a few different web browsers to test and see if the issue persists. While they will eventually fix most issues having the extra browsers will allow you to keep buying or selling items. When they run updates some times links and cookies get corrupted or old outdated data pointing to pages that no linger exist do not get deleted and replaced. It is always good to delete any browsing data and cookies. For each browser you can do a google search asking, "how to clear browsing data for " then specify the browser you are using. So for fire fox I searched google, "how to clear browsing data for firefox" and got the answer I copied and pasted in the earlier post.
If you are having issues that do not get resolved by clearing the data then check the community to make sure it is known. Even if it is a known issue a call to ebay support to report you are having the problem can help. While they may know of the issue the more users that report it will cause them to give the issue a higher priority to fix it.
