This is likely due to Google Chrome's upcoming changes that will make access to Adobe Flash (which the site was built on for years) difficult to non-existent in line with Flash's phase-out by the end of 2020, requiring a large-scale rebuild of the desktop site that cannot be done behind the scenes. It is possible that access to programming and games for desktop visitors could be restored in some point in the near future, with all elements having full compatibility with HTML5 standards. Those videos and games remain accessible via the alternative .tv domain of nick.tv.