If you put Part-DB into a subpath via the reverse proxy, you have to configure your webserver to include `X-Forwarded-Prefix` in the request headers.
For example if you put Part-DB behind a reverse proxy with the URL `https://example.com/partdb`, you have to set the `X-Forwarded-Prefix` header to `/partdb`.
In apache, you can do this by adding the following line to your virtual host configuration:
```
RequestHeader set X-Forwarded-Prefix "/partdb"
```
and in nginx, you can do this by adding the following line to your server configuration: