This error message refers to a problem with the motion controller when updating the firmware.
This error can usually be resolved easily by taking the following steps:
- Reboot the Ultimaker S5 by using the on/off button
- Update the firmware to the latest “stable” version and check if the error has disappeared. Instructions on updating the firmware can be found in the Ultimaker S5 manual
If the problem still persists, please contact support by raising a support request above.