Whenever i double click on tileset the project crashes

Please help as i am a newbee but i need a project draft done today.
it started when i first created a tileset from a texture. whenever i doubled click on tileset to apply collider it crashed the project. and it has something to do with the launcher i guess because it also doesnt allow me to write ‘tileset’ on the browser, if i do the browser also crashes.i have to restart my computer to normalize my browser. please help!!