I first got confused and searched for the DEC in my steemit wallet and only then figured out it is in this separate steem engine account. I logged in there, all DEC were there but transfering them back into my player account didn't work.
Transfering to steem engine I tested out again, it did work. I did not have any problems with steemconnect before. Actually I bought several cards the last days and it always worked then fine.
I always get an Missing Active Authority message.
So: What do I have to do to solve this problem?
(I want to buy DEC with my steem and then use it for the new cards and potions.)
I also do not have the slightest inclination to download chrome for this another extra application Steem Keychain Browser extension.

I also have another question concerning the potions.
Alchemy and Legendary 500 charges - does this mean 500x the improved reward for any quest or bi-weekly reward? (If yes, then you are mad. Especially if you can actually combine them and get a guaranteed golden legendary every time on a normal quest on a bronze account (as you have the 100% option).) They shouldn't be able to use at the same time.