General Error Codes
| Code | Description |
|---|---|
| 2 | cannot open/create logfile(s) |
| 10 | invalid value in configuration |
| 11 | error reading or writing configuration |
| 20 | no action specified |
| 21 | unknown action requested |
| 22 | disabled action requested |
| 23 | wrong response format |
| 83 | database error |
| 100 | no connection to server |
| 101 | Unknown action |
| 102 | error code received from merchant API |
| 120 | authentication failed |
| 999 | Unknown error |