Blank White Screen After Activating Plugin
I just installed the wpForo plugin. When I activate the plugin and click on Customize I get a blank white screen. As soon as I deactivate the wpforo plugin everything starts working again.
I am using the Astra theme.
When I activate the plugin and click on Customize I get a blank white screen.
I don't follow you, where do you press Customize? Appearance > Customize?
And please provide forum URL.
Blank / white screen is called White Screen of Death and usually is a FATAL crash.
Enable Wordpress standard debug to a log and check the issue.