Letters Avatar Plugin Fix.

yzc_enable_gravatar.php

<?php

/**
 * Letters Avatar Plugin Fix.
 */
add_action( 'init', 'yzc_enable_gravatar' );
function yzc_enable_gravatar() {
    remove_filter( 'bp_core_fetch_avatar_no_grav', 'yz_disable_gravatars' );
}

/**
 Add this css to your site.
 
 .youzer .sgi-letter-avatar {
    border-radius: 100%;
}
.youzer .yz-profile-img .sgi-letter-avatar  {
  display: table-caption;
}
.yz-account-header .yz-account-img .sgi-letter-avatar,
.youzer .yz-group-img .sgi-letter-avatar,
.youzer .yz-profile-img .sgi-letter-avatar  {
  width: 100% !important;
  height: 100% !important;
}

*/