I had this code (https://flow.m5stack.com/?examples=unit_env_pro_demo) working on my Core2 for AWS for several years. I re-purposed the Core2 for a short time, and now when I try to load the code with flow.m5stack.com, it says connecting for about a second, and the says disconnected. I have loaded UIFlow_Core2 1.14.4 with no problems. I have entered the API in UIFlow.

OK, it loaded, but when I select it under App and click on run, it restarts and comes back to the main UIFlow menu with App, Flow, and Setup.

And now it's back to saying disconnected in UIFlow. I've tried multiple USB cables and ports.

Any suggestions?

How about a reliable, working v-training site that doesn't spit out the following error at least 85% of the time?

Welcome to nginx!

If you see this page, the nginx web server is successfully installed and working. Further configuration is required.

For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.

Thank you for using nginx.

Trying to go to https://v-training.m5stack.com/ results in a "Welcome to nginx!" message.
Trying to go to https://docs.m5stack.com/en/quick_start/unitv2/v_training results in a "Server error An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details." error

Any ideas?