Wrong endpoint

Hello, I'm testing migratekit on OVH Public Cloud; I set the variables in openrc.sh and I can connect from cli with openstack client; when I perform a migration, the process starts correctly, runs the snapshot on esxi, connects to the openstack instance but then gives me this error:

Creating snapshot 100% [=================================================================================] (100/100) [0s:0s]
WARN[0004] Change ID mismatch, full copy needed currentChangeId= snapshotChangeId="52 ca 91 a0 75 e3 bf 62-d0 0a 94 f0 fe 13 c0 e3/65"
INFO[0004] Attaching volume volume_id=***
INFO[0006] Detected instance UUID, attaching volume... instance_uuid=xyzzy***
Removing snapshot 100% [=================================================================================] (100/100) [1s:0s]
Error: Expected HTTP response code [200] when accessing [POST https://compute.uk1.cloud.ovh.net/v2.1//servers/a/os-volume_attachments], but got 404 instead: {"itemNotFound": {"code": 404, "message": "Instance xyzzy** could not be found."}}

The problem is that the region is SBG7 and the correct url is: https://compute.sbg7.cloud.ovh.net/v2.1/******/servers/a*****/os-volume_attachments. For now, I haven't found a way to fix.

Thank you.

Start by tracing the migration's OpenStack endpoint and region handling after the variables in openrc.sh are loaded, comparing the failing uk1 URL with the required sbg7 URL. Confirm completion by reproducing the migration against OVH Public Cloud and verifying that volume attachment uses the instance's regional endpoint without the 404 error.