Nebu John Thaliyath

Try adding one of these codes in .htaccess:

<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>

or

# Exclude the file upload and WP CRON scripts from authentication
<FilesMatch “(async-upload\.php|wp-cron\.php|xmlrpc\.php)$”>
Satisfy Any
Order allow,deny
Allow from all
Deny from none
</FilesMatch>

or

AddType x-mapp-php5 .php (at the very top of your .htaccess file)

NOTE: I always warn people when playing in .htaccess. The codes can differ from server to server, so it’s best to contact your hosting support and ask them if it’s alright to add one of the codes, or ask them to do it for you.

Better you check with your hosting provider and block those IP’s.

You may also try this plugin: https://www.ads-software.com/plugins/bot-block-stop-spam-google-analytics-referrals/

Regards

Did you tried uploading different images?

Check with your hosting provider if any accept headers are enabled. This error usually occurs because of the defective programming of systems or of the Web server which manages the site. Rarely some web browsers also cause this error. You may check that too.

MySQL is by default configured to work with localhost.

Make sure that your MySQL is binding to a socket on 0.0.0.0 and you should be able to connect to that socket. It may be already bind to 127.0.0.1 by default for MySQL, which will not be possible to reach from outside.
The MySQL configuration file should be in .\xampp\mysql\bin\my.ini. You need to find the bind-address parameter and change it to 0.0.0.0

After doing this everyone in your network should be able to connect to that MySQL instance.

Regards

Is this fixed? Did you checked for conflict between your theme and other plugins? Please do check your PHP error log too.