3503678 - Error: " Timed out waiting for tunnel to open for tunnelId account"

The connection type is SAP S/4HANA On-Premise. When validating connection, the error occurs:

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Connection "XXX" couldn’t be established.
- Data flows can’t be used because of errors in the connection.
- Replication flows can’t be used because of errors in the connection.
- Remote tables are disabled. - Model Import is disabled.

Data Flows: Cause: ABAP connector(Axino) ABAP connection check FAILED: request failed: rc=1, msg="Message: Opening connection to backend failed: Timed out waiting for tunnel to open for tunnelId account:///XXX-XXX-XXX-XXX-XXX/<LOCATION_ID>\nCode: RFC_COMMUNICATION_FAILURE"
Please refer to SAP Note 2849542 for more information.
Replication Flows: Cause: ABAP connector(Axino) ABAP connection check FAILED: request failed: rc=1, msg="Message: Opening connection to backend failed: Timed out waiting for tunnel to open for tunnelId account:///XXX-XXX-XXX-XXX-XXX/<LOCATION_ID>\nCode: RFC_COMMUNICATION_FAILURE"
Please refer to SAP Note 2849542 for more information.

Correlation ID: 3f36f666-bcc6-402a-77a3-b758caf36562

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SAP Datasphere

KBA , DS-DI-CON , Connections , Problem