irule Editor 11.6.1 not working with F5 @ 14.1.2.8

do you have any irule editor version later than 11.6.1. We had old version @ 11.6.1, which was working sweet with F5 @ 11.6.1, but soon after upgrading the F5s to 14.1.2.8, the irule editor is no longer connecting, and is reporting error as in "Invalid Connection information".

any tips here please.

Many thanks