An unspecified error has occurred

This is an error that is not is not recognized by the Ultimaker 3. It could mean that there is a mismatch between the installed electronics and firmware.

This error can usually be resolved easily by taking the following steps:

1. Reboot the Ultimaker 3 by using the on/off button.
2. 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 3 manual.