Firstly, ensure that you have given all the necessary permissions. Check this guideline on giving permissions in MacOS.

Then, follow these steps.

step 1: Stop the application. Quit it.
step 2: go to Finder>Applications. And right mouse click/ 2 finger press on the trackpad over Go to Show Package Contents.

Step 3: Select everything and delete.

Step 4: Delete/uninstall the app.
step 5: Download the app again and install it. Then, log in.