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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Using comment plugins such as Disqus

In order to use Disqus or other third party comment plugins you may need to disable the theme's own comment features. To do this go to Elementor > Settings > Advanced and disable the Theme Comment Features option.