Install the premiere app in offline mode

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with an enterprise subscription your can package your organizations apps and distribute offline.

teams

faq: https://helpx.adobe.com/creative-cloud/faq/teams.html

more info: https://www.adobe.com/creativecloud/business/teams/plans.html

enterprise

faq:  https://helpx.adobe.com/creative-cloud/faq/enterprise.html

more info: https://www.adobe.com/creativecloud/business/enterprise.html

You can contact Adobe support and ask them to provide you with an offline installer. They might be able to help. To contact support follow the instructions given below
1. Go to https://helpx.adobe.com/contact.html?rghtup=autoOpen
2. Wait a bit on the page that opens up, it should automatically open a chat popup. If that does not happen then look for a call out/chat icon at the bottom right, click over it and the chat popup should open
3. In order to talk to a human type "AGENT" in the chat box
4. If you are not able to get to the chat window, then disable your adblockers, firewall, enable cookies/scripts on your browser. If it still fails then change your browser/machine/network.

P.S. Be mindful of answering anyone who sends you a private message. See the following for more information about scammers
https://tinyurl.com/y7cfrr7y
-Manan