Paypal Sandbox not loading

By JulianJ

I’ve been testing my site with sandbox at paypal using this url: https://www.sandbox.paypal.com/cgi-bin/webscr and an ipn.
It’s been working fine but since yesterday nothing happens when my form is posted to the sandbox url above, the url does not load. Normal paypal seems to be working fine. Has something changed? Have I got something wrong?

The form I am posting

<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post">
            <input type="hidden" name="business" value="xxxxxx@gmail.com">
            <!-- Specify a Buy Now button. -->
            <input type="hidden" name="cmd" value="_xclick">
            <input type="hidden" name="item_name" value="Product1">
            <input type="hidden" name="item_number" value="1">
            <input type="hidden" name="amount" value="10.00">
            <input type="hidden" name="currency_code" value="USD">
            <!-- Specify URLs -->
            <input type='hidden' name='cancel_return' value='http://www.xxxx/cancel.php'>
            <input type='hidden' name='return' value='http://www.xxxx/success.php'>
            <!-- Display the payment button. -->
            <input type="image" name="submit" border="0"
            src="https://www.paypalobjects.com/en_US/i/btn/btn_buynow_LG.gif" alt="PayPal - The safer, easier way to pay online">
            <img alt="" border="0" width="1" height="1" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" >
        </form>

Source: Stack Overflow

    

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