Trouble with League launcher not opening

I recently tried opening league of legends and the logo would pop up and then dissapear. I've tried deleting the files for it but it wont work. Ive tried over and over but don't know how to fix this issue. If anybody could help I would appreciate it.

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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