fazilhussain

Use -> get_category_link

Click on short copy embedded code and paste on Post

I think you changed the theme. On the left menu go Appearance then theme. check the active theme

yes

In the left panel, select Users > User Role Editor. You’ll be taken to the plugin’s main interface.
Select the user role you want to modify from the top dropdown menu. You’ll see a list of all capabilities currently allowed for this role. Check the box next to Show capabilities in the human-readable form to list these functions more clearly.
Select/deselect the capabilities you want to add to/remove from the role.
Click Update, then Yes in the Confirm window. The list will refresh with updated permissions.

Hi if you still facing an issue check use SMTP https://www.smarterasp.net/support/kb/a1476/send-email-with-easy-wp-smtp-and-contact-form-7-plugins.aspx

Hi check this video for add fields https://www.youtube.com/watch?v=P2On2Igk4xQ

Try to contact the hosting providers for backup.

Install this plugin https://www.ads-software.com/plugins/enable-jquery-migrate-helper/ and active it.

check this plugin https://www.tawk.to/

use custom css
.widget ul li:before {
display:none;
}

are you using a plugin or using standard wp for registration?