I just opened 3 portkeys, the last one gave me this error screen and when I came out. That portkey was gone.
I just had the exact same issue! I've been having a few issues with thr game since yesterday.
I just had the exact same thing. A few minutes ago I opened one of my portmanteaus and when I clicked one of the lights it gave me an error and the portmanteau disappeared from my inventory. I didn't receive any items now. Is there a way to retrieve the portmanteau? It was a kettle portmanteau. Kind regards, Maaike