3515934 - LeanIX Signavio API synchronisation errors Could not retrieve input source fields from SAP Signavio

When trying to sync LeanIX with SPM the following error is thrown:

Error

Could not retrieve input source fields from SAP Signavio.

Please check your SAP Signavio settings and credentials.

The browser developer tools displays an error with this response:
{
    "message": "Invalid configuration",
    "errors": [
        "Sync must be timer based, when top-down mode is active."
    ]
}  

Setting the LeanIX config variable timerBasedSync to true resolves this error. 

Example:

"name": "first configuration",
"active": false,
"maximumDeletionRatio": 50,
"glossaryFetchTimeoutSeconds": 60,
"timerBasedSync": true,
"syncMode": "CONSERVATIVE_SYNC",
"processFactSheetType": "Process",
"leanixConfig": {
"workspaceId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
"targetSystem": "https://<xyz>.leanix.net",
"userId": null    },  

KBA , BPI-SIG-CA-INT , Import / Export for SAP Signavio , Problem