I got a problem about getting and updating stream data

Hello, thank you, I need some help.
My project is an IoT project using blynk platform and cytron edu:bit. It worked when I was in Hong Kong where I finished my project. I can synchronize the data that is, I can control my device using blynk app, and also I can change the data in app by operating my micro:bit edu:bit device.
It worked when I was in Hong Kong, but after a flight, it doesn’t work when I come to London. I don’t know if the problem is because of the change of location? if so, how can I solve it?

Log in to the web console and check the region that is shown in the bottom right hand corner.