Redirect after download file | WordPress.org

Hello, so i have some code it should redirect user to thank you page after he or she clicks on a download button, but someting not working downt know why maybe someone can help. I add this code in a simple custom html widget, can you tell me what did i wrong?

here it is:

<script>
    Function webrpoint(){
        setTimeout("location.href="https://invoicemanta.online/thank-you/" ,2000");
    }
</script>

<a onclick="webrpoint()" class="downloadLink" href="https://github.com/hql287/Manta/releases/download/v1.1.4/Manta.Setup.1.1.4.exe" >Download Now</a>

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