firebird854, you are very responsive to the issues cropping up, hope you can figure it all out. i'm sure you've tested this out a lot, but no amount of testing in-house will be the same as in a user's hands. as a developer i know.
my issues:
in fire fox i am unable to create a route.
read the splash screen more clearly to see anything about supported browsers so switched to edge. still unable to create a route. i can get as far as a green dot but no further. in your post 27 i see a context menu, i have no idea how to activate that in the browser. mouse does not work, maybe some sort of key combination?