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Form buttons not working on various sites, e.g. PayPal

  • Opera: 64.0.3417.73
    Windows 10

    There seem to be quite a few websites where HTML5 buttons don't work in Opera.
    They work find in Chrome and Firefox.
    For PayPal pay portal the console shows this error:
    TypeError: Cannot read property '_listeners' of undefined
    Code
    function eventProxy(e) {
    return this._listeners[e.type](options.event && options.event(e) || e);
    }

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