That sounds very odd. Am not familiar with this problem.
I wonder perhaps if it has something to do with your browser cashe? It might be worth deleting just to see if this improves the situation.
Am hosting the PDFs on Odysee so you could potentially just go direct to this page in the meantime.
Thank you for th link to Ody!!! I realized that the error happened every time I tried to open the links in a new tab. Equally odd because before it worked this way without problems.
Cheers!