Android mobile app - Unable to dial - Incorrect number error

When trying to dial a number from the mobile application I receive '“Incorrect Number” The same error is presented when dialing from the call history list.

Environment: STAGING
Client: Android
Build number: 363
Realm: e1c9ae.uk.sip.weuc.com
Call Details (Direction, From, To, Date):
Direction: inbound
From: Karl McNicholas
To: 07918274780
Date: 2025-04-07T13:14:17.000Z
CDR ID: 202504-a8b281cb-67e2-45f3-8186-73a606781f57
Timestamp: 1744031658000
UserId: 67dc2806ff80a8cf4f967ffe