Vanilla New Version Installation Error

jaceout

I'm getting error while trying to install new version of vanilla

Fatal Error in Vanilla\Theme\FsThemeProvider.getThemeAddon();

Theme not found.

The error occurred on or near: /home/hellotounce/public_html/library/Vanilla/Theme/FsThemeProvider.php

 96:         if (!$theme) {
 97:             // Try to load our fallback theme.
 98:             $theme = $this->addonManager->lookupTheme(ThemeService::FALLBACK_THEME_KEY);
 99:             if (!$theme) {
100:                 throw new NotFoundException("Theme");
101:             }
102:         }
103: 
104:         return $theme;