SymptomsAfter upgrade to Plesk Billing v5.6.0 psigate module fails with "ERROR MESSAGE: PSI-0112:transaction not authorized. Check StoreID and Passphrase."
ResolutionYou can revert to the 5.3 version of the module. The only file you will have to replace is:
Do not forget to backup your system before doing changes.
This is fixed in the latest Plesk Billing. Please, check http://sp.parallels.com/download/plesk/billing/ for the latest version abailable.