Michael,

I just started a test checkout on the site, and I should have checked the plugin settings first, but it looks like the Client Key and Client Secret fields are empty. These are both required with the new UPS API. You can find exact instructions on obtaining these credentials from your client's UPS account here:
https://docs.j2commerce.com/j2commerce/shipping-methods/ups-shipping#how-to-obtain-ups-oauth-credentials

Let me know if you run into any other issues.

Adam

Michael,

It appears that you are still experiencing issues with the API key. Can you double-check the values you entered in the UPS plugin against the UPS account and ensure there are no spaces? The current API Key doesn't appear to be normal (there should be no spaces in the key).

Adam

Michael,

The error: 0 Call to a member function getAccessToken() on null still persists.  This indicates an issue with the API key itself. Did you set this up according to the instructions in the documentation, or did your client set it up and send you the necessary information?

Using another live UPS account's credentials on the site confirms that the plugin itself works fine; the issue lies with the API key, either incorrect keys or improper permissions not set in the UPS developers portal.

If the client can provide you with temporary access to the UPS.com account and you follow the instructions in the documentation above, you should be able to complete this task in no time at all. 

I will keep this ticket open to ensure you can get it working. Please keep me updated on the progress.

Adam

Glad to help. I will close this ticket and make it public so that others can learn from this experience as well. 

Adam