Adding tracking number when sending 3 orders in one post

[vintage-computing-uk]

I posted 3 orders to the same buyer in one package using a single EVri QR code of one of the items to generate shipping label. When I go to the Orders section now and check the other two items in the package that I sent and then click on "Postage" above to try and add the tracking number to those two it takes me to this page:

https://www.ebay.co.uk/n/error?statuscode=500

Is there any other way for me to add tracking number to items already posted?

It will not allow me to mark them as dispatched either

[**peaseblossom**]

Generate the original prepaid labels then see if you can add the tracking via the More Actions dropdown menu or View Order Details > Postage > Track Package > dropdown arrow.   That needs to be done on a desktop browser but not sure if it will allow same tracking number to be added.  

If not at least it will show as dispatched and without tracking money will be released in 14 days.

If you paid forl the original labels you can cancel them here:
https://www.ebay.co.uk/claims/simple-delivery/refund/seller
Or if the buyer paid it will be refunded to them automatically in 30 days.