Can't Sign on to Kindle in Boox Max 3

Hi, I am a professional writer, and I wanted to use the Boox Max to read a science book and take notes in it. I don't normally use Kindle but the book was only available in e-format on Kindle. When I try to sign in to my amazon account in the Boox Max Kindle app, I can't, because when I type my email, it doesn't end up in the email box. Weird foreign letters (don't know what language) show up above the keyboard as I type.

Please help.