The latest release of Google Chrome (Version 70) has changed the default browser settings to disable autoplay functionalities. As a result of that, Stackla Event Screens might not work as expected when rendering content with such settings disabled.
In order to re-enable the autoplay functionality, please open your Google Chrome browser and under the Settings options locate the Autoplay Policy section. Alternatively, place the following on the browser address bar: chrome://flags/#autoplay-policy
Then, change the settings from ‘Default’ to ‘No user gesture is required’. You will need to relaunch Chrome for the changes to take effect.
If you require any further assistance with this please don't hesitate to contact support.