We have similar issue, the only difference -trying to call https destination.
Getting in hana log:
XsIpConnection IPConnection.cpp(00072) : IPconnection can not initialize libsapcrypto. rc = -40
In XSJS service:
HttpClient.request: request failed. The following error occured: unable to establish connection to <host>:443 - internal error code: Secure store initialization failed
PS: we are running SP7