You are most likely trying to update to a version beyond the compatible with the theme.
With all our bundled plugins we try to hide the plugin update message, unfortunely sometimes the plugins still will show you the update message, since the versions bundled with theme wont be available yet on the same version you wont be able to update it.
You can follow the latest compatible version on our version compatibility page:
If you are still facing issues, please access your site via FTP and remove visual composer from wp-content/plugins and go back to your wp admin dashboard > X and install it again.
Hope it helps