Hello @skirridsystems,
We’re aware of the issue where a blank page appears when trying to access the Speed Optimizer’s settings page in the network admin panel. A fix for this will be released in an upcoming version of the plugin.
Regarding the other issue you reported, I was unable to replicate it on my end. I didn’t encounter any errors when trying to save changes in Settings -> General of a subsite in the Multisite installation. I tried this with both the super-admin user and an admin user of the subsite.
At this point, I’m unable to provide additional information about this issue. If you’re a SiteGround client, please open a ticket from your Client Area and our Technical Support team will verify if the issue is indeed related to our plugin.
Best Regards,
Kuzman Stoyanov