Index: trunk/src/wp-admin/theme-install.php
===================================================================
--- trunk/src/wp-admin/theme-install.php	(revision 38722)
+++ trunk/src/wp-admin/theme-install.php	(revision 39325)
@@ -49,5 +49,9 @@
 		'upload'              => __( 'Upload Theme' ),
 		'back'                => __( 'Back' ),
-		'error'               => __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="https://wordpress.org/support/">support forums</a>.' ),
+		'error'               => sprintf(
+			/* translators: %s: support forums URL */
+			__( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
+			__( 'https://wordpress.org/support/' )
+		),
 		'themesFound'         => __( 'Number of Themes found: %d' ),
 		'noThemesFound'       => __( 'No themes found. Try a different search.' ),