Did you change the default 5-second averaging foe another duration?
The index for that moving average is labels based on that time. Ordinarily it's 'MHS 5s', but if you change that parameter, the name of the index label will change, i.e. to 'MHS 10s' etc. Anubis just looks for 'MHS 5s'.
You can change to code pretty easily to suit your needs, just do a search/replace.
I don't copy. I have tried to add the host with or without any values in the
MH/s desired field, but I still get the same errors. I have also tried to remove all variables that has connection to the desired mhs value, but it won't work...