Hey there @amansahil, sorry you’re running into trouble.
With regards to #2, we know this is a disruptive limitation. Please read this blog post from last week for more details and suggestions for how to work without QR codes.
For #1, it looks like maybe we’re having trouble starting a tunnel for your project. This might be due to issues connecting to our third-party tunnel provider. As a workaround, are you able to switch the connection to localhost or LAN by clicking the gear icon?
For #3, we’re not aware of any server errors viewing our projects right now. Can you provide more details about the url you were trying to load, what device (or PC) you were using, and what region of the world you were trying to connect from?
Hope this is helpful,