@faizanzahid the current version of NodeBB still has compatibility with those plugins. Future version will not.
Topic watching change
Please see https://github.com/NodeBB/NodeBB/pull/4662
If you have a custom theme that has a
partials/topic/watch.tplyou will need to update it for 1.1.0.
You can see the changes you need to make in https://github.com/NodeBB/nodebb-theme-persona/pull/278/files
Persona, vanilla and lavender themes are already updated.