Cant create Flashcards from PDF

Hey guys, I am seriously considering memo.cards as my go to AI tool for learning. But before I am comfortable to pay money, I wanted to test it out.

Unfortunately, for unknown reasons, it can not even process a simple PDF file. The following error message was produced after attempting it.

“Failed to process document” - “this.stream[Symbol.asyncIterator] is not a function”

For some more information how i arrived there:
- Free Plan
- From “New Deck” → Create from “PDF”
- Below you see the Document Details

Here is the lecture attached to test for reproducability:

And here the screenshot of the error: