Hi! I have been trying to follow the steps of the getting started tutorial but using the tap-spreadsheets-anywhere. As I was configuring the parameter I stumbled upon a strange message. I was configuring the start_date parameter, then got an error:

Object of type datetime is not JSON serializable

. So I edited the metano.yml, deleted the start_date line and added it command line. From that moment, I got a message saying that my current project is not compatible with the current version of meltano:

$ meltano config tap-spreadsheets-anywhere set tables '[{"start_date": "2015-01-01T00:00:00Z"}]' 
This Meltano project is incompatible with this version of `meltano