Why website is not opening, is this PHP version issue?

[ChrisPAR]

Did you do this?

@Admin

For example, WordPress has a setting WP_DEBUG which can be used to show the actual error message. You can learn more about that option in the WordPress knowledge base: https://wordpress.org/support/article/debugging-in-wordpress/

If nothing is being shown, then this may help:

Installation failed: There has been a critical error on your website

WordPress supports installing and updating plugins and themes from the official store right through the WordPress admin interface. However, after trying to install or update a large plugin (like WooCommerce) or theme, you may encounter an error like this: Installation failed: There has been a critical error on your website. Please check your site admin email inbox for instructions. Learn more about debugging in WordPress. This error means that the installation process crashed, and may have l…