Trying to get property of non-object

« MODX Parse Error »

Error : fopen(http://bers.net.ru/xml/maphistory.php): failed to open stream: HTTP request failed! HTTP/1.1 403 Forbidden
Error information
ErrorType[num] WARNING[2]
File /var/www/public_html/includes/CacheManNG.class.php
Line 72
Source $handle = fopen($url, "rb");
Current Snippet CWMapHistory

Basic info
REQUEST_URI http://berserk-online.com/istoriya-voyn.html
Resource [241] Летопись Клановых войн
Referer
User Agent CCBot/2.0 (https://commoncrawl.org/faq/)
IP 3.209.80.87
Current time 2019-10-21 00:42:05

Benchmarks
MySQL 0.0124 s (13 Requests)
PHP 0.1072 s
Total 0.1196 s
Memory 1.5264053344727 mb

Backtrace
DocumentParser->executeParser()
index.php on line 126
DocumentParser->prepareResponse()
manager/includes/document.parser.class.inc.php on line 2140
DocumentParser->outputContent()
manager/includes/document.parser.class.inc.php on line 2233
DocumentParser->parseDocumentSource(string $var1)
manager/includes/document.parser.class.inc.php on line 668
DocumentParser->evalSnippets(string $var1)
manager/includes/document.parser.class.inc.php on line 2003
DocumentParser->_get_snip_result('CWMapHistory')
manager/includes/document.parser.class.inc.php on line 1408
DocumentParser->evalSnippet(string $var1, array $var2)
manager/includes/document.parser.class.inc.php on line 1466
eval()
manager/includes/document.parser.class.inc.php on line 1360
getCWMapHistory()
manager/includes/document.parser.class.inc.php(1360) : eval()'d code on line 3
CacheManNG->get('maphistory')
includes/snippet_cwmaphistory.php on line 15
CacheManNG->getXML('maphistory')
includes/CacheManNG.class.php on line 157
CacheManNG->fetchURL(string $var1, 'maphistory')
includes/CacheManNG.class.php on line 124
fopen(string $var1, 'rb')
includes/CacheManNG.class.php on line 72