errors not working

Hello
this plugin wont work for me and I get errors.
I even tried the developers example plugin code and doesnt work, but works on developers website

<label> Checkbox (required)
[cf7cc_checkbox* checkbox_test id:checkbox_id “default=0” “15|Red, with blue lines and black roof” “15|Black, with blue lines and black roof” “60|Blue, with blue lines and black roof”] </label>

<label> Radio (required)
[cf7cc_radio* radio_test id:radio_test_id “default=0” “59|$59” “69|$69” “79|$79”] </label>

<label> Dropdown (required) (required)
[cf7cc_dropdown* dropdown_test “placeholder=Select Product” “20|T-shirt” “30|Business Cards” “40|Brands”] </label>

<label> Slider (required)
[cf7cc_slider* slider_test id:slider_test_id min:0 max:100] </label>

<label> Subtotal (checkbox_test + radio_test + dropdown_test + slider_test)
[cf7cc_calculated subtotal] </label>

<label> VAT (subtotal * 0.1)
[cf7cc_calculated vat] </label>

<label> Total (subtotal – vat)
[cf7cc_calculated total] </label>

<label> Your Name (required)
[text* your-name] </label>

<label> Your Email (required)
[email* your-email] </label>

<label> Subject
[text your-subject] </label>

<label> Your Message
[textarea your-message] </label>

[submit “Send”]