We have a 2013 Toyota RAV4 LE with a little less than 100k miles. When we bought it, all doors unlocked and locked with the key as expected. After about a year, the driver door slowly stopped responding to the key signal and would only operate sometimes, other times needing to be unlocked manually. As time went on, it failed entirely, and slowly but surely every other door on the vehicle did as well (except the tailgate, that continues to work). This happened a little while after we installed an aftermarket remote starter on it, however I'm not sure if that had anything to do with it. When I sit in the car and try to lock the doors from the key, I notice the lock on the door panel attempting to move, but it can not. Im wondering if anyone knows what could be the cause of this issue or how it could be fixed?

Thank you for any advice you may have

Nathan