While trying to run HP ALM functional UFT tests from Jenkins using "Execute functional tests from HP ALM", getting error message as

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Server has been disconnected while performing GetServerSettings action
Error: "ALM server [https://almdfcs.saas.hpe.com/qcbin] unreachable, check that server Url is correct"

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Same setup was working fine till 1 week back. ALM and UFT are working fine and well connected.

Console Output

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Started by user admin
Building in workspace C:\Program Files (x86)\Jenkins\workspace\ALMBatchRun
[WS-CLEANUP] Deleting project workspace...
[WS-CLEANUP] Done
[ALMBatchRun] $ "C:\Program Files (x86)\Jenkins\workspace\ALMBatchRun\HpToolsLauncher.exe" -paramfile props28032017160713548.txt
"Started..."
Timeout is set to: -1
Run mode is set to: RUN_LOCAL
Server has been disconnected while performing GetServerSettings action
Error: "ALM server [https://almdfcs.saas.hpe.com/qcbin] unreachable, check that server Url is correct"
Build step 'Execute HP functional tests from HP ALM' changed build result to FAILURE
Recording test results
RunResultRecorder: didn't find any test results to record
Warning: you have no plugins providing access control for builds, so falling back to legacy behavior of permitting any downstream builds to be triggered
Triggering a new build of EmailTrigger
Finished: FAILURE

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ALM url is opening fine. Required plugins are present. I am able to run the ALM tests using OTA script without Jenkins, so connectivity wise it is fine.

Same jenkin build was working perfectly fine till 1 week back.

I have checked with latest version of HP Application Automation Tools Plugin also (5.1) but same result.

Only thing I suspect is the connectivity from Jenkins to ALM as on system config page the message in ALM server section says "Error openning a connection to the ALM server". Screenshots are attached.

But I am not able to figure out why is this happening. Same thing was working till last week.

Please help.