ADT 3.18 stopped working on Eclipse 2021-06

Hi,

I just updated my eclipse to 2021-06 from 2021-03. The ADT version is 3.18. And after the update, ADT suddenly stopped working now.

When I try to open the existing projects or add a new ABAP Project, I get this error: "No file system is defined for scheme: semanticfs"

Eclipse 2021-06 is even mentioned in https://tools.hana.ondemand.com/#abap as compatible.

Anyone have an idea what could be going wrong?