Troubleshooting an Language is Invalid Error when registering a domain

Symptom

After applying the 8.0.0 update, domain registrations via LogicBoxes modules (ResellerClub, NetEarthOne, Stargate) can fail with the following error:

Language is Invalid

This is caused by the new required variable for processing IDN registrations.

Solution

Please apply the 8.0.1 Maintenance Release via the Utilities > Update WHMCS page.

Hotfix