The bug is simple. You cannot open your first creation on Roblox. This is a bug you can reproduce by creating a Roblox account and trying to open your first creation.
Expected behavior
I expect that my first experience on Roblox will actually open and connect to the server like it’s supposed to
I personally was able to fix this bug by doing a full reinstallation of Roblox Studio but Roblox may use this as a motivation to fix the issues that potentially caused this to occur. Thank you!
If you set your “Incoming Replication Lag” setting in Studio Settings to a very large number like 3000, does the same thing happen?