a custom context path prevents sign in

Using release version 3.25.1-02, if a custom context path is set to any value other than the default of slash ( / ), then users will not be able to authenticate to NXRM under some circumstances like the UI login dialog, or when generating a support zip using REST API.

Reproduce

1. edit nexus.properties and add nexus-context-path=/nexus
2. start NXRM
3. browse to http://127.0.0.1:8081/nexus
4. attempt to login to NXRM UI with valid credentials
5. Signin will fail

If the context path is set to default value, signin will work.

Expected

Authentication with custom context path should work as in previous versions.