Unable to upload mfw_nrf9160_1.3.1.zip to Thingy 91X

Hello, 

I downloaded the zip file "mfw_nrf9160_1.3.7.zip" from nordic and I am trying to upload it via the programmer tab in the nrf connect to desktop app, but I keep getting the error attached. I have made sure the Thingy 91 is in serial recovery mode, I have unplugged/plugged it back in, and turned it on/off multiple times. I have gone to chat gpt and it is saying the reason why it is not working is because the zip file does not contain the file "manifest.json" and "update.bin". I was wondering if any one has come across this as well and if they were able to fix it. 

Ultimately I am trying to have the Thingy 91 record accelerations, transmit that data via cellular and download it in a google drive. So if am going in the wrong direction to achieve this goal please let me know too. 

Thank you, 

Nicolas Vargas

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