Firmware Issues and DroneBlocks Block Code Options Not Appearing

I’ve done countless firmware updates and also deleting and re-downloading apps. I’m always getting issues with either Firmware pausing or stuck on a certain percentage. I’ve also had issues where DroneBlocks will connect to the drone but not show any coding options down the right hand side. This is purely frustrating when using in a classroom setting. I’ve also opened the DroneBlocks app to our school server and then disconnected so that DroneBlocks connects to the server to download the functions. I then disconnect from school server to connect to the Tello, these code blocks will once again disappear.

If any help could be provided it would be much appreciated.

I also use Chromebooks and iPads to input code.