Update file claro.theme
Removing function claro_preprocess_fieldset__media_library_widget(array &$variables) {} to allow claro to work in 10.3.6.
Earlier patches weren't applying to 10.3.6
Removing function claro_preprocess_fieldset__media_library_widget(array &$variables) {} to allow claro to work in 10.3.6.
Earlier patches weren't applying to 10.3.6