I’m new to work with dynamo, some weeks ago I was tweaking with it, and it worked alright, installed some packages to try to follow some tutorials, this morning I tried to use it again and I noticed that the select model element node has the selection box grayed out, this is happening with a lot of other nodes and also the select by category node you can use the selection but once you start you cannot finalize the command, I already uninstalled the packages but dynamo is still not working, maybe this is a stupid issue with a very simple fix, but I can’t understand what is going on 
so wanted to look out for help! Photo attached of all the selection nodes grayed out,
EDIT: This might have something to do with the file I’m working because I tried to open a new project and Dynamo works alright, what in my file might be causing the trouble?
EDIT 2: Now i find it’s more weird because dynamo is working on plan view but not in 3d view, I don’t have idea what might be going on