My phantom 4 pro gimbal will not move when I run through a calibration.  I also get an overloaded alert.  It moves freely and I've gone through updates and IMU calibration.

Hi sburm67, thank you for reaching out. Please try to remove the SD card and refresh the latest firmware via DJI Assistant 2. Restart the drone and check again.
If the issue persists, please send the drone back for further diagnosis and service. Please start a case at https://www.dji.com/us/service/repair if there is a need.

Hello there sburm67. I am sorry for the trouble this has caused and thank you for reaching out. May we please know before this issue happened was there a hard landing or a crash that happened to your DJI Phantom 4 Pro and may we also know if you are receiving any error messages as well? Thank you.

Thank you for getting g back. There was no hard or incident. It was working fine and this came up.