@amarinelli this forum uses the master branch... it's probably fixed in some recent version.
I would suggest you upgrade to atleast v0.9.4 and check if the issue still exists. If it does then you will have to wait until v1.0.0 is released.
Hi. After installation and login to admin, i dont see menu and see many <p> tags. What is this?
Looks like your installation was not successful.
Could you try rebuilding NodeBB? Perhaps something happend with just this step and redoing it will fix the forum.
If this doesn't work, then reinstallation will probably be required (or at least the easiest way).