Can you fix the PDF errors please

When I upload a pdf into my character chat, the chat starts bugging massively. Like it literally will just repeat afterwards ‘And unexpected error occured. Please try again’ no matter what I send and it can’t answer anymore properly. And I tested that in multiple different chats btw. I am using mostly deepseek model but I switched to other models and the same issue happened also in GLM 5 and Qween 3.