2409708 - RFC communications error with system/destination TMSADM@SID.DOMAIN_SID in STMS

The following TMS Alert is raised when trying to read Import Queue in STMS transaction:

Clicking the yellow question mark "?", error details shows:
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RFC communications error with system/destination TMSADM@SID.DOMAIN_SID
Message No. XT101
 
Diagnosis
An RFC error occurred in the TMS communications layer.
Target system: SID.DOMAIN_SID(Client number)
Function: TMS_TP_SHOW_BUFFER
RFC message: Error when opening an RFC connection (CPIC-CALL: '
 
System Response
The function terminates.
 
Procedure
Correct the error and execute the command again.
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When you perform a "connection test" in transaction SM59 for destination CALLTP_WindowsNT or CALLTP_Linux, you can see the following error:
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Connection Test <destination name>
Connection Type TCP/IP Connection 

Error Details timeout during allocate / CPIC-CALL: 'ThSAPCMRCV', communication rc: CM_PRODUCT_
Error Details ERROR: timeout during allocate
Error Details LOCATION: SAP-Gateway on host <hostname> / sapgw<XX>
Error Details DETAIL: no connect of TP <//..tp.exe> from host <hostname>
[...]
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Release independent

XT101, RFC_COMMUNICATION_FAILURE, ThSAPOCMINIT, CALLTP_WindowsNT, CALLTP_Linux, timeout during allocate, no connect of TP, RETURN CODE: 242, CM_PRODUCT_SPECIFIC_ERROR, RSRFCPIN, ThSAPCMRCV, RFCIO_ERROR_MESSAGE, DIR_CT_RUN, gateway, tp.exe, RFCIO_ERROR_SYSERROR, TCP/IP Connections, STMS, AL11, SM59, ST11, dev_rfc, dev_rd , KBA , BC-CTS-TMS , Transport Management System , Problem