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Just what it says on the tin. Crashes with no error and nothing in installer.txt.
I can't help without a log file. There is always a log given under the "Minecraft Log" tab within the instance settings.
@dyiing Looks like I figured it out myself. Turns out that if you don't have any instances in multimc installed the Aristois installer hangs. I created a instance and I was able to install as normal.
Oh alright. Normally when people say installer they actually mean the launcher lol