Hope you are doing well and thanks for reaching out.
Is this an issue with a particular PDF file or with all the PDFs? Please try with a different PDF file and check.
What happens when you try to edit the PDF? Do you get any error messages? If yes, please share a small video recording of the steps you are taking and the issue as it occurs would be very helpful.
In the meantime, please try to edit the PDF online here: https://adobe.ly/4iI33co and see if that works.