If you try the whole thing again and end up with the same result, this will means that you have just encountered a bug. Maple just don't know where to put you in. Hahaha. Just report it in your Passport and someone will fix it fast.
Once I have this problem whereby I just can't go into CS. Problem is I have so very old cash item inside there. I reported it and it got fixed within the hour. But, of course, this is MSEA, if it is GMS then I do not know.