Anyone know why my soccer coaching board works on JSFiddle but not my WordPress site please?

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Hi – made this on JSFiddle –
https://jsfiddle.net/m63rsy9x/

Works fine – the arrows can be added and mvoed around

however, the arrows don't work on my wordpress site –

I copied an pasted the html and JS (in script tags underneath the HTML) and added to insert headers and footers – and added short code to the page

ANy ideas why the arrows don't work please?

TIA

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