From this blog, you will have the general information regarding what are the general or the most common issues that occur while using the software of roblox.
So, just have a look to this blog and get your concerns or worries cleared.
What are the signs that show there is a problem in the connection?
If you are finding difficuilty while loading particular game or you are getting any type of error message.
If you find the error message that will show you that the games are shut down.
IF you find that the games are taking so much time to load.
If you are getting difficulty while playing particular game.
Here are the reasons that may cause this problem
Having slow internet connection: If you are having the problem related to the slow internet connection, then this problem may persist. There may be possible that your system is not compatible with the game, you can check its compatibility from roblox home.
Having empty game: This is possible when there is not game present online and you are still trying to load the game.
Having security issues: This may be the reason that why your online game is not getting loaded, your browser security is restricting the game to get loaded. So, check out the security of your browser first and then start the game again.