Geckolib animated entity not editable

Hello! I am using Geckolib to create custom animated entities. However, everytime I make an entity in my workspace and save it (so officially add it), whenever I open the entity again and try and change some of the settings, the save button doesn't work. Both the save and close and the save and keep open. If I use the X and close the entity then all the changes I made to the Geckolib entity do not save.
Does anyone know how to fix this?