Hello, I am experiencing this same issue: Internal Server Error when trying to subscribe to a package using the Sanbox. I was going to deliver (change from sandbo to live) my project on Monday this week and failed exactly when showing the demo to clients... Very embarassing! Do you (PayPal) have a date when this is going to be resolved? This is my button: <form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target="_top">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="G9RRXJD6V5BHY">
<table>
<tr><td><input type="hidden" name="on0" value="Membership Level">Membership Level</td></tr><tr><td><select name="os0">
<option value="Level 2">Level 2 : $1.00 USD - monthly</option>
<option value="Level 3">Level 3 : $10.00 USD - monthly</option>
<option value="Level 4">Level 4 : $33.00 USD - monthly</option>
</select> </td></tr>
</table>
<input type="hidden" name="currency_code" value="USD">
<input type="image" src="https://www.sandbox.paypal.com/en_US/i/btn/btn_subscribeCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.sandbox.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form> Right now even the www.sanbox.paypal.com is failing for me. Very stressful to have this from a secure company. If there is a planned maintenance, they should tell at least at some point of the process. Several hours lost figuring out this issue. Thanks in advance. Hope to hear something promising soon.
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