autotutorial

read please I updated the previous post.

I still see these links in “google search console”. Google indexes these links. So I thought of redirect. yes please.

this is good, it means your site is indexed (still uses ajax crawler 2015) I could tell you how to rewrite in htaccess but it is likely that you will break your indexing.

https://developers.google.com/search/docs/ajax-crawling/docs/specification
domain[:port]/path?_escaped_fragment_=hashfragment
in the case of ugly url (query string) it is right to see those parameters.

WordPress has introduced many changes, before updating you must be sure to use theme or plugins compatible with WordPress 5.3.
If with the default theme twenty* e
disabled plugins don’t see error means you can’t use the theme or that plugin
https://wordpress.org/support/topic/read-this-first-wordpress-5-3-master-list/

https://wordpress.org/support/topic/which-is-the-correct-way-to-use-wordpress-multisite-with-different-domain-names/#post-12198764
when you change the secondary site from the edit button the domain mapping is activated.

Multisite subdomain
Network: domain.tld https://domain.tld/wp-admin/network/
Secondary site: blog.domain.tld https://domain.tld/wp-admin/network/site-info.php?id=2
Other secondary site: forum.domain.tld (etc..) https://domain.tld/wp-admin/network/site-info.php?id=3
if the network is on https all secondary sites must have https

From WordPress 4.5 or or higher (without plugin) Domain Mapping for secondary site of one network

htaccess, virtual host, uploads etc. Other

Warning: Cannot modify header information – headers already sent by (output started at /home/healit/testdb.org/wp-includes/class.wp-styles.php:225) in /home/healit/testdb.org/wp-content/plugins/healdb/include/health_camp.php on line 6

the healdb plugin calls ( /home/healit/testdb.org/wp-content/plugins/healdb/include/health_camp.php on line 6 ) wp-styles.php? this is a plugin that is not present on the wordpress repository you have to ask for support where such plugin exists.

manual installation is independent of the code that the server will have to execute because you are sending only files with no value for it.
There is no good practice because WordPress is variable.
You must back up your files and your database.
read the extended update instruction and apply this improvement, download the WordPress version unzip the file on your PC and add your themes, plugins inside the wp-content folder.
if your hosting offers you the possibility to send compressed archives you have to exit the files from the wordpress folder and compress them in a zip file.
Back-up and manuale update https://wordpress.org/support/article/upgrading-wordpress-extended-instructions/
you must also enter your upload folder, the attachments reside here (by default but you can choose a different path, by themes, plugins, uploads etc … This can and must know who created the first wordpress installation).
Look at your local code and make sure you always use your default theme (even inactive but it will be used automatically in case of problems)
Your local Default theme (it can different) Default theme
in the simplest case, you will get the manual installation guide without adding themes, plugins and uploads.
obviously you must initially updated to 4.8.11 with active plugins … on the server side you need to enable php error logging, you can also insert the constant into wp-config.php (it will be limited to the wordpress context and will only work if the server does not have the error log disabled). log_errors = 'On';
you can disable the single plugin or theme via ftp just rename the wp-content / plugins / my_plugin folder in old_my_plugin.

the deprecation warning indicates that in php 7.2 (for core and plugins) (now create_function and __autoload it deprecaded) you have to use something else, I searched for wp-cufon and it is an old plugin.
https://wordpress.org/download/releases/
the last of the branch 4.8 is 4.8.11 (in en_US).
I don’t know if it creates problems for your theme.