WPMU-Triden update error messages via Auto Updater

Downloading update from https://premium.wpmudev.org/wdp-un.php?action=download&key=16...e&pid=45…

Unpacking the update…

Installing the latest version…

Removing the old version of the theme…

Theme updated successfully.

Warning: fopen(/home/.../public_html/wp-content/themes/wpmu-triden/style.css) [function.fopen]: failed to open stream: No such file or directory in /home/.../public_html/wp-includes/functions.php on line 4452

Warning: fread() expects parameter 1 to be resource, boolean given in /home/.../public_html/wp-includes/functions.php on line 4455

Warning: fclose() expects parameter 1 to be resource, boolean given in /home/.../public_html/wp-includes/functions.php on line 4458

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I checked again and WPMU-Triden wasn't listed as a theme needing updating anymore...

Is this expected behavior?