This file is not valid. Private key not available! (build 5281)

[LukaszWiktor]

I'm getting the following warning when uploading a tracklog from my SkyDrop to xcontest.org

The IGC file itself also says that it's not valid:

AXSBDRP:3855303139360A0D001500
HFDTE110124
HFPLTPILOTINCHARGE:
HFCM2CREW2:NIL
HFGTYGLIDERTYPE:
HFGIDGLIDERID:
HFDTMGPSDATUM:WGS84
HFRFWFIRMWAREVERSION:build 5281
HFRHWHARDWAREVERSION:drop_1506
HFFTYFRTYPE:SkyBean,SkyDrop
HFGPSRECEIVER:Quectel,L80,22cm,18000m
HFPRSPRESSALTSENSOR:Measurement specialties,MS5611,25907m
HFALGALTGPS:GEO
HFALPALTPRESSURE:ISA
HFTZNTIMEZONE:+1.0
HFFRSSECSUSPECTUSEVALIPROG:This file is not valid. Private key not available!

Looks like the same issue as #467, but it's occurring on the latest build 5281.

[bubeck]

No, thats a bug. 5281 is an official build but it is lacking the key. @fhorinek Please check and either rebuild or increase build number.