RossMitchell

My thoughts:
– You mention having both mySQL and MariaDB, they could be tripping over each other, suggest only having one or other installed and not both.
– Have you installed “phpmyadmin”, it is very useful. Does it run ?
– Otherwise can you connect to the mySQL server using the command line ? Something like:
mysql -u <dbUserHere> -p
Try
man mysql
for options. Does it work ?

Most likely your localhost computer does not have a working SMTP service, hence your WordPress on localhost cannot send emails.
Various solutions:
– add one of the SMTP plugins, it will connect out to the internet and your email will get back to you.
– install an SMTP service on your computer.
– accept that not having your website send emails is ok during development, leave that bit of testing and functionality till you deploy the website.
– Get into your database using phpmyadmin and change your email address manually in the users table, this is akin to fixing your problem with a spanner.

For the flag spacing try this in your customizer > additional CSS

a.glink {
    padding-left: 0 !important;
    padding-right: 0 !important;
}

Figuring out the hover and active menu changes is harder. Suggest that you examine your custom theme’s CSS files and OR consult your theme developer.
As a start you should learn how to use your browser inspector for addressing CSS issues.

In my website hosting management I use the GUI database program PHPMYADMIN to access my database. I would:
– Take a complete database backup.
– create the new table
Not familiar myself with “custom safe query”, Among the viable techniques is to register shortcodes, or create custom page templates in your child theme. In this PHP code declare the global $wpdb and do code your queries, be careful and be sure to use the “prepare” method to safely sanitise user input and prevent SQL injection attacks.

my support its over, can you help me to fix that ?

You will normally be able to purchase extended support from your theme vendor.

As I said:
“suggest that you test by try a different theme.”

Suggest that you discuss this with your website hosting technical support, I think that it is likely that the server time settings are wrong.

Have you installed other plugins or themes on this site? same hosting ?
Suggest enabling DEBUG, retry installation and look at error logs.
Otherwise do a manual install:
– unzip locally
– upload using filezilla
– activate

It is MUCH better to change some css to do this, in customizer > Additional CSS add something like:

.widget-categories .screen-reader-text {
 display:none;
}

It is never a good idea to change core code, your changes will get lost at every update.