I started receiving this error from Ublox M8N gps module:
[ERROR] [946728090.283526888]: FCU: [lpe] gps fault 0 0 11 0 0 0
[ERROR] [946728094.544263148]: FCU: [lpe] gps fault 11 0 22 0 0 0
[ WARN] [946728098.449896186]: TM: Clock skew detected (-0.013404696 s). Hard syncing clocks.
[ERROR] [946728099.510047591]: FCU: [lpe] gps fault 100 0 2343 0 0 0
[ERROR] [946728108.329073275]: FCU: [lpe] gps fault 207 217 33569 0 0 0
[ WARN] [946728109.146536592]: TM: Clock skew detected (-0.019844256 s). Hard syncing clocks.
[ERROR] [946728110.136092425]: FCU: [lpe] gps fault 45 301 39469 0 0 0
[ERROR] [946728117.568683532]: FCU: [lpe] gps fault 262 10000 63591 0 0 0
[ WARN] [946728118.264084183]: GP: No GPS fix
[ERROR] [946728125.920239899]: FCU: [lpe] gps fault 202 1349 19915 0 0 0
[ WARN] [946728129.741526482]: TM: Clock skew detected (-0.014373753 s). Hard syncing clocks.
[ERROR] [946728136.515749775]: FCU: [lpe] gps fault 186 3635 9315 0 0 0
[ WARN] [946728139.808559959]: TM: Clock skew detected (0.015620481 s). Hard syncing clocks.
[ERROR] [946728140.132455561]: FCU: [lpe] gps fault 279 6482 572 0 0 0
[ERROR] [946728144.203582110]: FCU: [lpe] gps fault 3 11853 668 0 0 0
Could be the gps problem (is dying) or the Firmware problem? This error is happening on random and after replugging the problem usually disappears.