Mobile Version

Dear Team; 
I created a quiz that works on desktop great. Unfortunately the mobile version doesnt work at all. I am not able to press the button "start". Instead of being red as in the desktop version - the button is grey and doesn't react. I tride it with different divices. Please help me solve the issue. 

Here is the beginn from the AMP report, if needed I can send you the full report
:



[

    {

        "url": "https://jetztzeit.blog/2023/08/01/quiz-schweiz-fragen-bundesfeiertag/",

        "type": "is_singular[post]",

        "label": "Beitrag",

        "amp_url": "https://jetztzeit.blog/2023/08/01/quiz-schweiz-fragen-bundesfeiertag/?amp=1",

        "validation_errors": [

            {

                "code": "STYLESHEET_TOO_LONG",

                "type": "css_error",

                "spec_name": "style amp-custom",

                "node_name": "link",

                "node_attributes": {

                    "rel": "stylesheet",

                    "id": "quiz-maker-sweetalert-css-css",

                    "href": "https://jetztzeit.blog/wp-content/plugins/quiz-maker/public/css/quiz-maker-sweetalert2.min.css?ver=__normalized__",

                    "media": "all"

                },

                "node_type": 1,

                "sources": [

                    {

The page I need help with: [log in to see the link]