error when trying to take a backup.

So I’m getting this error when trying to run a backup:

Fatal error: Uncaught exception ‘Exception’ with message ‘DateTime::__construct(): Failed to parse time string (012–11-9- 7-8-5_) at position 0 (0): Unexpected character’ in X:\directory1\directory2\wp-content\plugins\websitedefender-wordpress-security\db-tool.php:578 Stack trace: #0 X:\directory1\directory2\wp-content\plugins\websitedefender-wordpress-security\db-tool.php(578): DateTime->__construct(‘012–11-9- 7-8-…’, Object(DateTimeZone)) #1 X:\directory1\directory2\wp-content\plugins\websitedefender-wordpress-security\wsdplugin.php(138): include(‘E:\websites\fxc…’) #2 [internal function]: wsdplugin_pageDatabase(”) #3 X:\directory1\directory2\wp-includes\plugin.php(403): call_user_func_array(‘wsdplugin_pageD…’, Array) #4 X:\directory1\directory2\wp-admin\admin.php(151): do_action(‘wp-security_pag…’) #5 {main} thrown in X:\directory1\directory2\wp-content\plugins\websitedefender-wordpress-security\db-tool.php on line 578

What is wrong / I am doing wrong here?

This is my second WP site on the server – the first runs fine.

I did not do any adjustments to the server before I installed WP on the second site, which is a full WP site. So I do not understand why it happens on the seconjd site but the first works very well.

FYI: I’m using 2003 server/iis & PHP version 5.3

Thanks!

Kind regards

Daniel