Hello @pranav_k1,

I hope you are doing well!

- Have you tried to install the package via cluster libraries?

- Is this the only library not installing or failing with timeout?

- Can you please try with: %pip install databricks-mosaic==0.3.9 --verbose to obtain more insight on the failure?

- Has there been any recent change on the network, like a firewall that might be blocking outgoing requests?

- I also would like to double-check cluster configurations. 

I just tried to download the package using DBR 12.2 LTS and worked for me but took some time to download.