Obstructions or broken support roller between the bottom of the slide box and the floor. May need to remove the bottom front fascia to access. Did you get an error code? Is the slide cocked? Just a thought. The clicking noise may have been the stepper motors syncing or low in power.
Are your batteries in good condition. This slide takes a lot of power. Just thinking out loud. If your batteries are weak or old may not have sufficient charge.
Out of thoughts. Keep us informed.
2014 Sunseeker 3170 DSF
Dorothy, Garrette and Miss Bella.
Retired and having fun.