Save as PDF issue

I recently updated my computer last week (Feb 2022) and prior to this update I was able to click and drag thumbnails of documents from large PDFs and also click "File --> Export as PDF" as well as "Print --> Save as PDF." Ever since this new update, I have not been able to do this with my files. As a teacher this is something I do what feels like a million times a day and now my job is much harder because it's like my PDF only will print all 300 pages of my curriculum documents or a single one. Anyone know how to fix this? It worked fine before I updated my Mac to the newest software macOS Monterey Version 12.1