Are you using a bunch of LUA code? I’ve found that when i have some serious issues in the code, I’ve gotten into that state.
To get the text back, do this
You may have to go back to 3.1. Then back to 3.1.7 once it’s restored
Other things I’ve done - with the E1 connected to the computer, being up the web UI, go into controller, change some routing config then change it back so the Apply button lights up. Then press Apply to send a good config tob the E1