Handle multisite entries.

src/ServiceProvider.php

@@ -29,13 +29,26 @@ protected function registerServices()
     }
 
     /**
-     * Extract the Statamic template data for the
-     * current entry and pass it to our singleton.
+     * Process the view data that has been set up
+     * by Statamic. This is very convoluted but
+     * it's efficient!
      */
     protected function registerViewComposers()
     {
         // Append slash to path if necessary
         $path = substr(request()->path(), 0, 1) == '/' ? request()->path() : '/' . request()->path();
+
+        // Remove multisite url prefixes if necessary (we can't find entries by uri when they are prefixed)
+        foreach(\Statamic\Facades\Site::all() as $site) {
+
+            $sitePrefix = str_replace(request()->root(), '', $site->url);
+
+            if(strlen($sitePrefix) && str_starts_with($path, $sitePrefix)) {
+                $path = substr($path, strlen($sitePrefix));
+            }
+
+        }
+
         $template = null;
 
         if($entry = Entry::findByUri($path)) {