Using af_readability I got some problem: Instead of getting the content of a page, I got the content with an unreadable encoding. For example:  Îáîëîíñüêîìó ðàéîí³ ñòîëèö³ 17 áåðåçíÿ ï³äïàëèëè áóä³âëþ ìàãàçèíó Roshen á³ëÿ ñòàíö³¿ ìåòðî “Ãåðî¿â Äí³ïðà”. instead of “В Оболонському районі столиці 17 березня підпалили будівлю магазину Roshen біля станції метро “Героїв Дніпра”.”
The error I got from tt-rss is below. Can anyone help me?
Uncaught TypeError: Argument 1 passed to iterator_to_array() must implement interface Traversable, null given in /data/web/1/000/060/948/248191/htdocs/tt-rss/vendor/andreskrey/Readability/Nodes/NodeTrait.php:324 Stack trace: #0 /data/web/1/000/060/948/248191/htdocs/tt-rss/vendor/andreskrey/Readability/Nodes/NodeTrait.php(324): iterator_to_array(NULL) #1 /data/web/1/000/060/948/248191/htdocs/tt-rss/vendor/andreskrey/Readability/Nodes/NodeTrait.php(421): andreskrey\Readability\Nodes\DOM\DOMText->getChildren(true) #2 /data/web/1/000/060/948/248191/htdocs/tt-rss/vendor/andreskrey/Readability/Readability.php(1270): andreskrey\Readability\Nodes\DOM\DOMText->hasSingleTagInsideElement('tr') #3 /data/web/1/000/060/948/248191/htdocs/tt-rss/vendor/andreskrey/Readability/Readability.php(1166): andreskrey\Readability\Readability->prepArticle(Object(andreskrey\Readability\Nodes\DOM\DOMDocument)) #4 /data/web/1/000/060/948/248191/htdocs/tt-rss/vendor/andreskrey/Readability/Readability.php(155): andreskrey\Readability\Readab