Please check are there any update of the software. Meanwhile please consult the apps owner for more details how to troubleshoot and are there any setting that are required. But for the TV troubleshooting, you can try to reset the TV first. The initial reset is just powering of the power plug and wait for a moment before trying again. If this method does not solve the issue, you can try to reset the TV inside the setting menu and select reset to factory default setting. If these methods have been tried, you may consult Skyworth customer service team for further support or clarification.