I was uploading the latest LoTW entries to ARRL LoTW today, and the TQSL application found errors on validating some QSOs done in Contestia mode.
Looks like the Contestia mode is not recognized by ARRL !
I solved the problem by editing the ADIF file and changing the contestia record with DATA
Hope this can help
Thanks for the information, did QSO in contestia as well. Will change to to data before uploading, hope the other station is doing that as well. 73, Bas