Hi Stumbler! Fireman Torch here to assist you with any concern you may have 🚒 
It would appear that you have disconnected from the server while playing Stumble Guys. 
Playing Stumble Guys requires a very good internet connections with download and upload working together simultaneously.
We recommend trying to reboot your Wi-Fi -router which might help or play with 4G/5G (not 5ghz Wi-Fi) -mobile connection for smooth Stumble experience.    

Other reason might be RAM-management on your device. If you are switching between applications when the game going on this can cause disconnect too. 
Glad to be able to assist you!