HTTP error 500 everytime Yoast SEO plugin is updated

Hi

Everytime I update Yoast my site goes down with HTTP 500 error. I have to reboot IIS to get it back up and running again

If I look at the PHP error log, the last couple of Fatal Errors were

[31-Jul-2017 12:53:17 UTC] PHP Fatal error: Uncaught Error: Class ‘ComposerAutoloaderInit0935e3cc2cd2930df80d2048a010631e’ not found in C:\inetpub\wwwroot\MYWEBSITE\wp-content\plugins\wordpress-seo\vendor\autoload_52.php:7
Stack trace:
#0 C:\inetpub\wwwroot\MYWEBSITE\wp-content\plugins\wordpress-seo\wp-seo-main.php(54): require()
#1 C:\inetpub\wwwroot\MYWEBSITE\wp-content\plugins\wordpress-seo\wp-seo.php(47): require_once(‘C:\\inetpub\\wwwr…’)
#2 C:\inetpub\wwwroot\MYWEBSITE\wp-settings.php(303): include_once(‘C:\\inetpub\\wwwr…’)
#3 C:\inetpub\wwwroot\MYWEBSITE\wp-config.php(102): require_once(‘C:\\inetpub\\wwwr…’)
#4 C:\inetpub\wwwroot\MYWEBSITE\wp-load.php(37): require_once(‘C:\\inetpub\\wwwr…’)
#5 C:\inetpub\wwwroot\MYWEBSITE\wp-admin\admin.php(31): require_once(‘C:\\inetpub\\wwwr…’)
#6 C:\inetpub\wwwroot\MYWEBSITE\wp-admin\plugins.php(10): require_once(‘C:\\inetpub\\wwwr…’)
#7 {main}
thrown in C:\inetpub\wwwroot\MYWEBSITE\wp-content\plugins\wordpress-seo\vendor\autoload_52.php on line 7

Anything obvious it could be?

Thanks