Hello,

1-In file handel\includes\widgets\codeless_socialwidget.php find this line:

if( !empty($facebook) )
  echo '<li class="facebook"><a href="'.esc_url($facebook).'"><i class="cl-icon-facebook"></i></a></li>';

edit to this:

if( !empty($facebook) )
  echo '<li class="facebook"><a href="'.esc_url($facebook).'" target="_blank"><i class="cl-icon-facebook"></i></a></li>';

This code: target="_blank" was addedn in the second block. Do the same change for the other socials.

2-Please add this code into your Additiona Css menu:

a.btn-style-material_square.btn-layout-medium.btn-font-medium.cl-btn.btn-style-material_square.btn-layout-extra-large.btn-font-medium {
    float: right !important;
}

3-Add this code:

.header_container.cl-header-light:not(.cl-responsive-header) .cl-btn:hover {
    background-color: #1E284F !important;
    color: #FFFFFF !important;
}

Best regards!

Hello,

This looks like a host issue. Did you perhaps change any DNS or ip lately? As first step, please try deactivating your plugins. Try again. If the issue is gone, try activating plugins one at a time to find the culprit.

This is a common wordpress issue, so you will be able to find plenty of similar case online. Here are a few that may help:
https://generatepress.com/forums/topic/scrape-nonce-check-failed-please-try-again-error-since-wp-4-9-update/
https://theusualstuff.com/wordpress-4-9-error-edit-files-resolved/

Best regards!