Window randomly cracked and landlord is saying I have to pay for replacement

Hello, please excuse my ignorance. My window cracked this weekend, exactly at sunset I heard a creeeeak and went to check it out and this crack was there. There was no previous chip or impact or anything to it. My landlord is saying I have to pay for the replacement. Is this the case? What are my rights or can I be evicted for not paying for replacement?

I’m so worried and frankly peeved off because this is not my fault. Please anyone who has had a similar experience would you tell me your advice?

TIA

PS. The second photo is clear silicone that the landlord has put on the crack until I pay for replacement.