All of the sudden my selection tool will not move objects. I can move them with the arrows and am able to resize them fine. However, if I try and move an object by clicking and dragging... nothing. The objects are not locked either. I have restarted the program and still have the same issue. Thoughts?
Very strange looks like it's about preferences corruption, ass you have mentioned the objects are moveable by arrow keys.
As a basic step and part of probing we can try performing the below operation to reset the corrupt preferences and see if works.
Solution 1: Reset Preferences
Now try to launch Muse and check if it works
Solutions 2: Uninstall and Reinstall
Uninstall Muse from Creative Cloud application
During the process please click "Yes Remove Preferences"
Once Muse is uninstalled and reinstall it and try to launch.
In the case above steps does not help please let me know we will try to do few more troubleshooting to fix this for you.