(TID) Fix add device tab via WebUI

Reporters

• Pablo Armingol (TID)
• Lluis Gifre (CTTC) [reviewer]

Description

Describe the bug. Error when accessing the 'add device' tab through the WebUI.

Deployment environment

• Operating System (include version): any
• MicroK8s (include version and add-ons): any
• TeraFlowSDN (include release/branch-name/commit-id): develop

TFS deployment settings

• list of components deployed: WebUI
• particular configurations you applied: none
• any other particularity you might find important: none

Sequence of actions that resulted in the bug

• none

Document the explicit error

internal server error 500