HapPanel Gihub Link

Hey there

I am new to openHAB and I am amazed about all the possibilites.
Still playing around but having a problem:
When pressing the get more button to create widgets, I am ask to enter a github repository full Name or url.

And an error message: Received fatal alert: handshake_failure

Any Ideas to solve that problem?
Thanks and reagrds

This might help you, your JRE is probably too old: