While preparing a form, I click on the checkbox to add it and place it where I want it to go. Once I click to place it, nothing happens, and the box disappears.
What is the version of the OS and the Acrobat DC you are using? To check the version go to Help > About Acrobat and make sure you have the recent version 24.02.20759 installed. Go to Help > Check for updates and reboot the computer once.
Also try to repair the installation from the help menu (Win Only) and see if that works.
You may also try to create a new test user profile with full admin rights in Win or enable the root account in MAC (https://adobe.ly/3V0IvRC) and try using the application there and check.