The regulator made the corresponding decision at a meeting on Wednesday evening.
The head of the state-owned enterprise filed a letter of resignation.
Guaranteed Buyer turned to the Cabinet of Ministers with a request for clarification on further actions.
The country’s Oil and Gas Regulatory Authority (OGRA) has said it would try to curb the impact of the strike, adding that and any disruptions would be met with legal action.
Ukraine must ensure that there are no debts to renewable generation at the end of 2021.
The IMF believes that a return to price controls is not only a highly ineffective way of subsidizing households, but also leads to the abuse of resources.