Internal error

[ZlumaNj1xVcJY_xwlPBbYAAAAFs] /mw/index.php?mobileaction=toggle_view_mobile&printable=yes&title=Special%3AAsk%2Fclass%3Dsortable-20smwtable-2Dstriped-20smwtable-2Dclean%2Fsep%3Dul%2Fformat%3Drss%2Forder%3Dasc%2Fsort%3D%2Foffset%3D0%2Flimit%3D20%2F-5B-5BProcessing-20error-20message%3A%3A%2B-5D-5D%2F-3FHas-20improper-20value-20for%2F-3FProcessing-20error-20message%2Fmainlabel%3D%2Fprettyprint%3Dtrue%2Funescape%3Dtrue%2Fsearchlabel%3DRSS TypeError from line 402 of /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/SQLStore/QueryEngine/QueryEngine.php: implode(): Argument #2 ($array) must be of type ?array, string given

Backtrace:

#0 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/SQLStore/QueryEngine/QueryEngine.php(402): implode(array, string)
#1 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/SQLStore/QueryEngine/QueryEngine.php(224): SMW\SQLStore\QueryEngine\QueryEngine->getInstanceQueryResult(SMWQuery, integer)
#2 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/SQLStore/SQLStore.php(369): SMW\SQLStore\QueryEngine\QueryEngine->getQueryResult(SMWQuery)
#3 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/SQLStore/SQLStore.php(357): SMW\SQLStore\SQLStore->fetchQueryResult(SMWQuery)
#4 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/MediaWiki/Specials/SpecialAsk.php(719): SMW\SQLStore\SQLStore->getQueryResult(SMWQuery)
#5 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/MediaWiki/Specials/SpecialAsk.php(451): SMW\MediaWiki\Specials\SpecialAsk->fetchQueryResult(array)
#6 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/MediaWiki/Specials/SpecialAsk.php(315): SMW\MediaWiki\Specials\SpecialAsk->fetchResults(SMW\Query\ResultPrinters\FeedExportPrinter, NULL, SMW\Utils\UrlArgs)
#7 /home1/vilenya/public_html/mw/extensions/SemanticMediaWiki/src/MediaWiki/Specials/SpecialAsk.php(170): SMW\MediaWiki\Specials\SpecialAsk->makeHTMLResult()
#8 /home1/vilenya/public_html/mw/includes/specialpage/SpecialPage.php(569): SMW\MediaWiki\Specials\SpecialAsk->execute(string)
#9 /home1/vilenya/public_html/mw/includes/specialpage/SpecialPageFactory.php(558): SpecialPage->run(string)
#10 /home1/vilenya/public_html/mw/includes/MediaWiki.php(288): MediaWiki\Special\SpecialPageFactory->executePath(Title, RequestContext)
#11 /home1/vilenya/public_html/mw/includes/MediaWiki.php(865): MediaWiki->performRequest()
#12 /home1/vilenya/public_html/mw/includes/MediaWiki.php(515): MediaWiki->main()
#13 /home1/vilenya/public_html/mw/index.php(42): MediaWiki->run()
#14 {main}