example : (https://docs.google.com/spreadsheets/d/1JopfGZMeZd4-2FKBQACkACYDgPIoaOy_w91sUj4601o/edit#gid=0 or https://docs.google.com/spreadsheets/d/1CECuNQAlAYffAWQElEiuvbgG3NyQcJLRwHHFc3AafE4/edit?ts=5a7aed52#gid=957959508)

Please share the gSheet to the good service account
Warning : Be careful to have all different column names in your Spreadsheet. If two columns have the same name, it will not work !!
http://localhost:5555/data?connectorID=GoogleDriveConnector&table=GetSpreadsheet&worksheetKey=1JopfGZMeZd4-2FKBQACkACYDgPIoaOy_w91sUj4601o%3a_0&appID=
In blue you have standard URL must be filled for each gSheet source
In green you have dedicated URL depending from your gSheet worksheetKey
URL is splitted in 5 blocs :
1) http://localhost:5555/data?connectorID=GoogleDriveConnector&table=GetSpreadsheet&worksheetKey=
2) Spreadsheet Key (example 1CECuNQAlAYffAWQElEiuvbgG3NyQcJLRwHHFc3AafE4)
3) %3a_
4) Worksheet Key (example 957959508)
5) &appID=