After update editor stop working

After updating WP and WC, it is not possible to add new Accordion or Read More.
The text editor does not work / is not visible, but all that have already been created work without problems.
I get this error message:

Ett fel av typen E_ERROR uppstod p? rad 121 i f?ljande fil: /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/views/accordion/settings.php. Felorsak: Uncaught Error: Undefined constant "YCD_TEXT_DOMAIN" in /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/views/accordion/settings.php:121

Stack trace:

#0 /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/views/accordion/generalView.php(9): require_once()

#1 /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/views/typesSettingsPage.php(48): require_once('/customers/0/3/...')

#2 /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/classes/ReadMoreTypes.php(53): require_once('/customers/0/3/...')

#3 /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/classes/ReadMorePages.php(115): ReadMoreTypes->renderView()

#4 /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/classes/ReadMorePages.php(73): ReadMorePages->renderExtension('/customers/0/3/...', 'AccordionTypeRe...')

#5 /customers/0/3/7/ddbaudio.se/httpd.www/wp-content/plugins/expand-maker/classes/ReadMoreInit.php(122): ReadMorePages->addNewButtons()

#6 /customers/0/3/7/ddbaudio.se/httpd.www/wp-includes/class-wp-hook.php(324): ReadMoreInit->addNewButton('')

#7 /customers/0/3/7/ddbaudio.se/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)

#8 /customers/0/3/7/ddbaudio.se/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#9 /customers/0/3/7/ddbaudio.se/httpd.www/wp-admin/admin.php(259): do_action('read-more_page_...')

#10 {main}

? thrown

this error occurs on all our stores that use this plugin

//Nick