Failed to load resource, 404 while using BASE_PATH

[silkofix]

NetBox version

v3.0.1

Python version

3.9

Steps to Reproduce

1. Go to IPAM -> VLANs
2. Click "Add"

Expected Behavior

Get all of searching fields like: "Tags", "Role", "VLAN Group"

Observed Behavior

I used BASE_PATH = 'netbox/'
Get a red box and api error.
netbox.js:8 GET https://localhost/netbox/netbox/api/ipam/roles/?brief=true 404 (Not Found)
I think the problem is in the link being created, it is duplicated.

When i removed BASE_PATH and use netbox like https://localhost/.
Link be like: https://localhost/api/ipam/roles/?brief=true and no problems further

[ziggekatten]

We use BASE_PATH and do NOT have this problem i 3.0.1.

[silkofix]

We use BASE_PATH and do NOT have this problem i 3.0.1.

ye i was reading #7091 :) But... Same problem was on 3.0.0
Maybe its problem with my proxy, but i don't think so... This problem was not on v2.11.12

[DanSheps]

Could anyone else confirm if this is an issue or not?

[jeremystretch]

Yes, this is a problem on the current develop branch. It looks like the base path is being added twice.

[jeremystretch]

Looks like this is a regression introduced under #7091. I think I have it sorted.