NPE exception raises when searching a new created page by its title

Created a new page in a one single language site, validated the home page and this new created one, search the new page by its name in the quick search , here the exception I had in the console (in attachment) and a big error on my browser, maybe the indexation had not been finished at that moment yet , I didn't pay attention but 2 s later the same search returns the correct result without any exception .