Google chrome browser, mobile version. Easy Appointments call function [ea_bootstrap width="800px" scroll_off="true" layout_cols="2"] The user has an error "Undefined" when clicking the button "Submit". In the WP / Easy Appointments / Appointments admin panel - аn empty line appears, with the contents "Status" is "Reservation".  After a while, the string itself disappears, but the id is added further. Version PHP 7.3 Version Easy Appointments 2.12.0 Maybe I need to enable a function or extension of some kind in the PHP?