Not able to create application link between Bamboo and Fisheye running on same machine

[Norbert]

Hi

on our Buildserver we have
Bamboo 6.10.2 and Fisheye  4.8.3 running

Fisheye is configured to use https directly (connect via https://<servername>
Bamboo is configured without https so you connect via  http://<servername>:8085

After updating fisheye (from 4.5.x) the application link is not working any more

I removed the old link and tried to create a new one
But it always fails because Bamboo is not able to connect to fisheye
I get

No response was received from the URL you entered - it may not be valid. Please fix the URL below, if needed, and click Continue.

Does somebody know what I'm doing wrong?