It may be that, to prevent clogging up of the WiFi for other users, the hospital WiFi router blocks access to knowing "gaming sites" (It is possible to configure a router to do this).
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Maybe your computer or Roblox hanged..If not, you can try refreshing it or trying another game. If this still not work, ask Builderman about it.
Uninstall roblox, start, all programs, roblox, uninstall, then reinstall it after downloading it again. Or just redownload and reinstall roblox.
If you have an apple computer then you can't download it. If it's not that then your computer is to old.
A number of reasons, the VIP is broken, something wrong with ROBLOX sever, its a scam or the VIP ID hasn't been input correctly.
If roblox is not launching games check several of the following. First make sure that you are running a supported browser (IE, Firefox, Chrome) on a supported OS(Windows XP or higher). If you are running supported software then try rebooting your computer. If Roblox still wont launch try uninstalling roblox from add/remove programs, then reinstalling it. If Roblox still wont work contact customer support.