1974744 - HTTP_COMMUNICATION_FAILURE in Help Center

When using the Help Center in Menu -> Help -> Application Help, "500 SAP Internal Server Error" occurs in browser:

Meantime in ST22, you can find a dump with the following information during the same timestamp:

Category                     ABAP Programming Error
Runtime Errors             RAISE_EXCEPTION
ABAP Program             SAPLWDY_HELP_LINKS
Application Component  BC-HLP-ABA

----------------------------------------------------------------------------------------------------
|Short text
|    Exception condition "HTTP_COMMUNICATION_FAILURE" raised.
----------------------------------------------------------------------------------------------------

|Information on where terminated
|    Termination occurred in the ABAP program "CL_HTTP_CLIENT================CP" -
|     in "IF_HTTP_CLIENT~SEND".
|    The main program was "SAPMHTTP ".

|>>>>>|    RAISE http_communication_failure.

SAPKB73101 - SAPKB73110
SAPK-74006INSAPUI

Help Center, Help Link, CL_HTTP_CLIENT, IF_HTTP_CLIENT, SAPMHTTP, SWDP_GET_URL_FROM_HELP_LINK, wdhc_help_center, RABAX_STATE, 500 Internel Server Error , KBA , BC-HLP-ABA , Help-Infrastructure ABAP (Help Center, SAP ECC only) , Problem