HTTP ERROR 500 After installing Auto Install SSL

I had problem showing that “you are probably offline” while i was adding pages. after that i installed “Auto-Install SSL” plugin. I am having cloudflare SSL. When i searched across internet, i found that its SSL Problem. So i installed this “Auto Install SSL” plugin. i checked “Cloudflare” in options and saved it. And after that my website became inaccessible. it is showing

This page isn’t working is currently unable to handle this request.

I tried changing htaccess; editing url in database; adding codes in wp-config.php; etc…

Please help me!

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