There was an error uploading the package.
Reason: 'Proxy Error'
Text: '<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">\n<html><head>\n<title>502 Proxy Error</title>\n</head><body>\n<h1>Proxy Error</h1>\n<p>The proxy server received an invalid\r\nresponse from an upstream server.<br />\r\nThe proxy server could not handle the request <em><a href="/unscanned-upload/">POST /unscanned-upload/</a></em>.<p>\nReason: <strong>Error reading from remote server</strong></p></p>\n<hr>\n<address>Apache/2.4.7 (Ubuntu) Server at upload.apps.ubuntu.com Port 443</address>\n</body></html>\n'