Manage Task Outcomes no loading , page blank

Hi, we use task with Outcome Options and in time, usually comes an need to add more new Outcome Options on the same task , but this options is really unstable with Keap … sometimes I see a plus button sometimes I do not see it, and I can see that Manage Task Outcomes in blue , where I normally click and I am given the options to add new Outcomes options, but most of the time that Mange Task Outcomes goes to a blanc page (using chorme ) Any adivice on how to add new Outcomes , I may be doing someting wrong that I can not get to the correct page.
Thank you,