autotutorial

You can use backend https://yoursite.com/wp-admin/?nocache=1 Without web cache.

else is an alternative if the first statement is true/false, you will only have that content once.
First statement
if ( is_front_page() && is_home() )
It return boolean (true/false) if is true
<h1 class="site-title"> <a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>
else
<p class="site-title"> <a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a>
https://www.php.net/manual/en/control-structures.alternative-syntax.php

had that domain been added by you?
Multisite have wp_x_options (x is int value) for not primary site , wp_options is for primary site.
backup your file via ftp and mysql https://wordpress.org/support/article/wordpress-backups/
Use Super Admin user (not Normal Admin) for primary site.
http://yourprimarysite.com/wp-admin/network/ (total access for all).
in no case you have to manually change the values ​​present in the database because in the database they are stored as objects and string length, if some plugin uses them things did not appreciate.

If you use WordPress managed with web cache option on the pro plan (only for United States and Canada), you can’t use cache plugins (not W3 Total Cache abd other plugin) the server already uses the cache
Web Cache, delete cache https://it.godaddy.com/help/svuotare-la-cache-12444

If you are a customer with a pro plan, you have the right to this assistance, in the simplest of cases you must explain how to set up web cache with or without ssl in wordpress managed https://it.godaddy.com/help/servizi-di-assistenza-wordpress-gestito-pro-27245
*Note the server cache is managed by godaddy, maybe you can modify this behavior with their plugin, the fact remains that web cache points to the correct local files (WordPress) but ssl on web cache does not work.
Web cache (is ssl web cache your problem) not work https://secureservercdn.net/160.153.137.15/067.92a.myftpupload.com/wp-content/uploads/2017/06/logo.gif?time=1572951714
Without cache work https://www.hythegardenlandscapes.co.uk/wp-content/uploads/2017/06/logo.gif
both are on the same path.

Now from WordPress 5.2 there is the fatal error class that goes into recovery mody … WSOD 5.2 an improvement to the classic page … does it work ini_set?

Check your file .htaccess root and change into root folder.

Bad example for moving from directory to root (htaccess wordpress BASIC, not multisite):

# BEGIN WordPress

RewriteEngine On
RewriteBase /wordpress/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wordpress/index.php [L]

# END WordPress

Good: remove folder wordpress/ 😉

# BEGIN WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

Add this constant into wp-config.php Before ABSPATH

define('WP_DEBUG',false);
// Without and slash
define('WP_HOME','http://www.mysite.com');
define('WP_SITEURL','http://www.mysite.com');

after making backups, use a plugin or php script to change the old path in the new way.
Back-up
Search and replace

Is path-based?
Path-based

Restriction
With super administrator user, what you see from, http://multisite1.localhost/wp-admin/network.php ?

ini_set
When WP_DEBUG is with the value boolean true it checks if WP_DEBUG_DISPLAY has the value boolean false, in the first (WP_DEBUG_DISPLAY with value false), WordPress set display error with ini_set to off.

ini_set( 'display_errors', 0 );

If so, what if I want to keep WP_DEBUG disabled, but also suppress PHP messages? What would be the correct approach? Is it OK to add this to wp-config:

ini_set( 'display_errors', 0 );

advanced topic, if your server sets the error display (php.ini or user.ini or htaccess flag). When there is a fatal error and WordPress 5.2 WSOD works go to recovery mode otherwise your screen will show you the error.