Changed Page Type, Whole Site Nonfunctional

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Okay, so I'm completely new to all of this (CSS, PHP, concrete5). I'm presently running concrete5 off a xampp localhost, just so I can easily test and experiment with things.

I was fiddling with a custom theme from a tutorial on building your own theme, and I went into Edit Mode and changed the page type. The browser went blank and now I can't get anything to show up on the site. D: How do I fix this? I deeply appreciate all input and advice, ahead of time.

 
Brainakazariua replied on at Permalink Reply
Brainakazariua
Try opening the dashboard directly instead of the site? just add /dashboard or /index.php/dashboard to the url.

if that doesn't work remove the theme you've been playing with and try opening it again. (the site or directly the dashboard)

if that too fails try forcefully "upgrading" the site to the current version, this is done by adding /tools/upgrade?force=1 or /index.php/tools/upgrade?force=1 to the url. it then forcefully upgrades to the version you already have.