Error 'Unregistered Connection' after creating multisource Data foundation layer in IDT

Hi Folks

I scanned SDN several times before creating this post ,  I found the problem mentioned but not the solution.

We have migrated from 3.1 to 4.1 all the universes and connections . when I create a multisource data foundation layer on two connections , some of them are showing tables and other is showing 'unregistered connection' please refer to screenshot.

If I create a single source data foundation on same connection it works fine . (Please refer screenshot below)

let's forget about migrated connections , I created New connections , published them to repository , created shortcut and then created single source data foundation on them . Everything goes smooth , BUT moment I try to create a new multisource  data foundation on them I get unregistered connection error for them shown below

I found one note which says right click and use QUICK FIX option but its not working .

Note 1935281:"Unregistered Connection" error is seen when double clicking on an migrated connection…

I have already gone through the posts below but this problem is not similar to them

Multi-source enabled universe connection issue

Multi Source Universe Data Foundation gives con... | SCN

We are using SQL SERVER 2012 as database.

Please help me , Am I missing any configuration, setting