I can't add a new page onto an existing document

In my math class, we use kami, and usually what happens is that whenever we do, there is an existing assignment we download with google drive. Once that sheet is done, we sometimes add pages (which our school purchased the full version of Kami so this feature is available to use for anyone), however whenever I try adding another page, I get an error message: An error has occured d4eaa290-4da5-4d9b-8845-5a5b04e4248b .

Please let me know how I can fix this or what I should do because it is withholding me from continuing my work which Is needed when turning in the assignment.