White screen after upgrading Vaadin from 14 to 24 – how to troubleshoot?

Thanks to the suggestion from @marcoc_753 and @knoobie

I was able to find the add on that caused the problem.
I was just removing/replacing the add on one by one to see if it resolves the issue

Note: The add-on page Version Matrix does not give accurate information about capability
For example, for twincolngrid, It shows 2.7.1 is good with vaadin 24
image

it was Twincolgrid 2.7.1 causing the issue, using 3.1.0 solved the issue.