It does not work to set the BTC amount to a value below 1, e.g. 0.03, in “Main chain rate” when creating a new dispenser using Counterwallet.io. Last week it was still working when new dispenser were created by clicking on “Address actions”. Thx a lot for your help.
counterwallet has an issue with creating dispensers for non-divisible assets. I would suggest using freewallet.io DESKTOP wallet for now, as it supports all the current features of Counterparty.