If your website won't load after updating to BuddyPress 12.1.1 it is likely a conflict with bbPress or another BuddyPress compatible plugin. Install the BP Classic plugin to fix this issue.

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Updating WPBakery Page Builder with the theme

If a WPBakery Page Builder update is available you will see a notice in your dashboard. Unless you purchased the plugin separately you cannot update the plugin automatically. You will need to wait for a theme update to be released which will include the updated version of the WPBakery Page Builder which you can then update from Appearance > Install Plugins.