I've built a new RPi and setup a new share key.
I was able to configure the receiver correctly.
Now when I try to edit it again I get the same message!
"We were unable to place your client into configuration mode. Please try again"
Please, anybody suggest a fix?
I received the dreaded email to say my feed was no longer, erm, feeding this morning.
No idea why as I feed various other sites from the same RPi.
Anyway, I went to my account page and noticed that the feed was listed as "Inactive".
Checking the logs there was an entry for invalid share...