Can't import pdf files

I’m having trouble importing a pdf ebook for private use. Every time I try to import the file using the “import book” feature it gives me this message:

" from_txt() takes exactly 3 arguments (2 given) "

I tried on two different computers and using two different browsers. I also tried importing a different pdf ebook that I had already successfully imported a few weeks ago, but this time I was met with the above message. I’m not really sure what else to try, so any recommendations would be super helpful.

Thanks for reporting the issue. I reported it to our team and we will do our best to have it fixed asap. Thanks for your patience.