Hey SParkling,
glad you were able to log back in eventually!
Regarding Flashplayer: We are aware of this problem. If you're using Chrome you can try to update your browser. (We got reports that the newest version of Chrome (71.0.3578.98) has this fixed, however, we weren't able to confirm that yet.) There is also a little more complicated way to bypass that problem, which has been discussed in the live forum here, but only in German, sorry!
What I would recommend is to update your browser first and maybe report back in this thread if it worked for you! I'm keeping my fingers crossed.
All the best and a merry Christmas (in the case that you celebrate Christmas, otherwise just a happy holiday!),
Mollymauk
Edit: Hey Flatulenz,
Da es sich bei PTR3 um einen Testserver für das kommende Birthday Festival handelt und man auf diesen auch nur Zutritt erhält, wenn man vorab ein Ticket gekauft hat, ist es auch auf PTR3 nicht möglich im nachhinein einzusteigen, sorry! Für mehr Informationen lies am besten einmal hier nach.