fatal error

I have a problem with my website

error message :

Fatal error: Uncaught Error: [] operator not supported for strings in /htdocs/site2/wp-content/themes/dentalia/widgets/so-widgets/orion-icon-w/tpl/orion_icon_w-template.php:39 Stack trace: #0 /htdocs/site2/wp-content/plugins/so-widgets-bundle/base/siteorigin-widget.class.php(211): include() #1 /htdocs/site2/wp-includes/class-wp-widget.php(378): SiteOrigin_Widget->widget(Array, Array) #2 /htdocs/site2/wp-includes/widgets.php(770): WP_Widget->display_callback(Array, Array) #3 /htdocs/site2/wp-content/themes/dentalia/templates/header/topbar-leftright.php(9): dynamic_sidebar(‘sidebar-top-bar…’) #4 /htdocs/site2/wp-includes/template.php(724): require(‘/htdocs/site2/w…’) #5 /htdocs/site2/wp-includes/template.php(671): load_template(‘/htdocs/site2/w…’, false) #6 /htdocs/site2/wp-includes/general-template.php(168): locate_template(Array, true, false) #7 /htdocs/site2/wp-content/themes/dentalia/framework/helpers.php(30): get_template_part(‘templates/heade…’, ‘leftright’) #8 /htdocs/site2/wp-content/themes/dentalia/header.p in /htdocs/site2/wp-content/themes/dentalia/widgets/so-widgets/orion-icon-w/tpl/orion_icon_w-template.php on line 39

i desactivated all plugins