The latest version of Crucible (3.0.2) is compatible with all versions of JIRA from 4.4 onwards. Please do not install such an old version of Crucible - 2.6 is unsupported and contains numerous bugs which have since been fixed.
It sounds like you're seeing that error because you need to enter the base URL for JIRA into fisheye withoiut the path. That is, something like:
Do not include the /secure/Dashboard.jspa
Thanks for signing up for Jira Ops! I’m Matt Ryall, leader for the Jira Ops product team at Atlassian. Since this is a brand new product, we’ll be delivering improvements quickly and sharing updates...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs