You are trying to scrape data off of someone elses source data. First make sure they didn’t shut the data off. If you can verify the data is still there, make sure it is in the same format as it was when the sensor wad working.
This is the nature of using other’s data, they are under no obligation to let you and your access the info does cost them money. they may have simply added an auth password and you will never get that again. Who knows…
This might help finding another weather source. Definitive guide to Weather integrations 🌦.