About This Hotfix
Due to an unexpected change in the GoCardless API, clients will encounter an error when paying an invoice with the EUR currency:
One of your parameters was incorrectly typed - scheme "sepa" is not a valid value. Must be one of [ach, autogiro, bacs, becs, becs_nz, betalingsservice, pad, sepa_core, ].
This will affect all versions of WHMCS.