Need help adding a text widget to header next to logo

it depends on what text and how many text you like to display:
As you see here in the board on top the Kriesi Logo is only the brand image (K) with additional text.
This could be obtained with Enfold presetted filters.
For Example if you like to have the wordpress name of the site and description to your logo:

add_filter('avf_logo_subtext', 'kriesi_logo_addition');
function kriesi_logo_addition($sub)
{
  $sub .= "<span class='logo-title'>";
  $sub .= get_bloginfo( 'name', 'display' );
  $sub .= "</span>";
  $sub .= "<span class='logo-title logo-subtitle'>";
  $sub .= get_bloginfo( 'description', 'display' );
  $sub .= "</span>";
  return $sub;
}

on using this filter it is possible to show besides your logo f.e. the actual page title :

add_filter('avf_logo_subtext', 'kriesi_logo_addition');
function kriesi_logo_addition($sub)
{
  $sub .= "<a class='page-title' href= '#'>";
  $sub .= "<span class='the-title'>";
  $sub .= get_the_title();
  $sub .= "</span>";
  $sub .= "</a>";
  return $sub;
}

there has to be css fittings to see the inserted elements

etc. pp
If you like to have a widget area – see here: https://kriesi.at/documentation/enfold/adding-a-widget-area-to-the-header/

the code above and alot of snippets you can find here on board or on: https://kriesi.at/documentation/enfold/code-snippets/ are for functions.php of the child-theme
but if you like to use one of the codes above (maybe the first) you will see on backend first none. Because the subs are there but not visible because there is some css missing too , to get them visible besides the logo.

for example here on board on top the info fades away on scrolling:
The amount of left and top positioning depends on logo size and header size etc. this is an Individual case decision

.logo img{float: left}
#top .logo, #top .logo a {overflow: visible }
#top .subtext {float: left; position: relative}

#top .logo-title {
transition: opacity 0.4s ease-out 0s;
-moz-transition: opacity 0.4s ease-out;
-webkit-transition: opacity 0.4s ease-out;
-o-transition: opacity 0.4s ease-out;
    color: #4678ae;
    font-size: 44px;
    font-family: "Comfortaa","HelveticaNeue","Helvetica Neue",Helvetica,Arial,sans-serif !important;
    font-weight: bold !important;
    left: 7px;
    opacity: 1;
    position: absolute;
    top: -12px;
    white-space: nowrap;
}

#top .logo-subtitle {
    color: #aaa !important;
    font-family: "Comfortaa","HelveticaNeue","Helvetica Neue",Helvetica,Arial,sans-serif !important;
    font-size: 18px !important;
    left: 10px;
    top: 18px !important;
    font-weight: normal;
}

#top .header-scrolled .logo-title {
opacity: 0;
filter: alpha(opacity=0);
}