Hello Joshua,
Assuming this is the SPC calibration from the Utilities menu, disconnect all inputs, adaptors etc., do a default setup then run.
If still failing SPC, there is a hardware failure and a repair will be needed.
To set up a repair RMA (model and serial number)
call 1-800-833-9200 opt 2.
Or send an email to rmarequest@tektronix.com
https://www.tek.com/en/services/repair/mytek_rma_request