When working with KING ERP 5.63a1, this error message may appear when exporting a financial booking.
Solution: download and install the latest version of the Zenvoices King webservice (minimum 1.11 required) on your server via this link.
Please note: only replace the file ZenvoicesKingWebService.dll.
When working with an older version of the Zenvoices King webservice, the message below may be displayed. The solution for this is also to update the Zenvoices King webservice to the latest version.
"Request to http://localhost:8080/code administratie/Boekingsgang_Afsluiten failed with status code 500 (Error occurred)."