Answer:
Due to incapable ruler of these European countries.
Step-by-step explanation:
European governments face so much political instability after the Hundred Years War in England because the leader of these countries are unable to rule over the country and this war also destroys the economy of the many European countries which bring political instability. Due to poor financial conditions of the people that occurs due to this war and the loss of their people, the people of these countries were unhappy with the ruler and start revolts against the government.