Hello, I'm Jan and I'm happy to help you today. I'm sorry that you are experiencing this problem. Please try this method below.
Press Windows key + R
then paste this directory below
%APPDATA%\Microsoft\Windows\Libraries
click ok
then the file explorer should open
then right-click on the Camera Roll folder
select properties
then click restore defaults
then click Apply.
If that didn't work. Open the Camera roll folder properties again
Click "Add" then select a new folder location where you want to save your camera photos
After you add the folder location under "Library locations:"
Select the new folder location then click "Set save location"