Fatal error: Uncaught TypeError: Return value of Classes\LeoApi::flattenEvents() must be of the type array or null, string returned in /www/htdocs/w019f5d3/kulturregion-nordschwarzwald/wp-content/themes/kultur/classes/LeoApi.php:315 Stack trace: #0 /www/htdocs/w019f5d3/kulturregion-nordschwarzwald/wp-content/themes/kultur/classes/LeoApi.php(233): Classes\LeoApi->flattenEvents('') #1 /www/htdocs/w019f5d3/kulturregion-nordschwarzwald/wp-content/themes/kultur/template-event.php(26): Classes\LeoApi->getEventsUpcoming() #2 /www/htdocs/w019f5d3/kulturregion-nordschwarzwald/wp-includes/template-loader.php(98): include('/www/htdocs/w01...') #3 /www/htdocs/w019f5d3/kulturregion-nordschwarzwald/wp-blog-header.php(19): require_once('/www/htdocs/w01...') #4 /www/htdocs/w019f5d3/kulturregion-nordschwarzwald/index.php(17): require('/www/htdocs/w01...') #5 {main} thrown in /www/htdocs/w019f5d3/kulturregion-nordschwarzwald/wp-content/themes/kultur/classes/LeoApi.php on line 315
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