You are using the ETMoses “beta” application. This is where new features may be tested prior to their full release, however stability cannot be assured and old LESes may cease to work without warning. You may prefer to use the production version instead.

test very simple

Payer Payee Applied to stakeholder Measure Tariff (EUR/unit)
customer supplier customer kWh of electricity consumed Price curve day and night tariff
supplier producer supplier kWh of electricity consumed Price curve dummy_merit_order_curce