Brilliant, @martijnn94!
Your solution worked for me as well.
I located the “id_form” tag and under it added the three lines below, as you suggested. Now the Submit button is back and functioning properly.
‘submit_button’ => ‘<input name=”%1$s” type=”submit” id=”%2$s” class=”%3$s” value=”%4$s” />’,
‘submit_field’ => ‘<p class=”form-submit”>%1$s %2$s</p>’,
‘format’ => ‘xhtml’,
