Internal error in TMS communication

What causes this issue?

An error occurred in the communication layer of the following SAP
system:
System: <LS>&V2&</>
Function: <LS>&V3&</>
Error: <LS>&V4&</>

System Response

The function terminates.

How to fix this error?

The following internal error occurred in the TMS communication layer:
<LS>&V1&</>

Error message extract from SAP system. Copyright SAP SE.