Badges

Hi, we're currently using Moodle 4.1.3 (Build: 20230424)

We backported the backpack fix from https://tracker.moodle.org/browse/MDL-75552 onto our build, and followed the config instructions as best we could, but there are a couple of steps we don't understand, and think it may be causing issues with exporting the badges to badgr. After having applied the patch, we've got a test badgr account in use, and we've got badges created to test with, so we followed these instructions. 

1. Go to "Site administration > Server > OAuth 2 services".
2. Create an "Open Badges" service with the following information:

• Name: <leave the default value> 
• Service base URL: https://eu.badgr.com 

Fine up to here, but then we're not sure what these steps mean:

1. Go to the Configure endpoints page for this issuer.
2. Check "apiBase" is one of the endpoints displayed.
   

We completed the following below steps anyway, hoping it would work either way. 

1. Go to "Site administration > Badges > Manage backpacks".
2. Create a new backpack with the following information:
   • Backpack API: https://eu.badgr.com 
   • Backpack URL: https://eu.badgr.com 
   • API version supported: Open Badges v2.1
   • OAuth 2 services: Canvas Badges
3. Logout (to guarantee the email is updated properly in the $USER var).

I'm able to connect my account from our Moodle instance to eu.badger.com, but when I try to export a badge, I get the following error: 


So, what we'd like to ask is, regarding the steps we missed, are we the issuer in this case, or would it count as badgr? 
If it's something we need to check on our end, are there instructions on how to access this page? If possible, a screenshot of what to expect would be very useful. 

1. Go to the Configure endpoints page for this issuer.
2. Check "apiBase" is one of the endpoints displayed.

And would skipping these steps cause the above error, if not, is there something else we're missing that we should look out for? 

Many thanks in advanced!