Hi,
I did everything you wrote. I turned off all plugins except Elementor. I turned on Twenty Seventeen theme and I still get the same error.
Catchable fatal error: Argument 1 passed to Epa\Api\SettingsApi::withSubPage() must be an instance of Epa\Api\string, string given, called in /public_html/kuchniapelnagadzetow.pl/wp-content/plugins/essential-premium-addons-for-elementor/inc/Pages/AdminPages.php on line 36 and defined in /public_html/kuchniapelnagadzetow.pl/wp-content/plugins/essential-premium-addons-for-elementor/inc/Api/SettingsApi.php on line 33
