3108456 - The route status keep "Activation in progress"

The route status keep "Activation in progress" is about mapping a SaaS application when perform command "cf custom-domain-map-route <Default SaaS URL> <Application Hostname>.<Custom Domain>".
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404 Not Found: Requested route ('<custom routes>') does not exist.
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And when check the routes using command "cf custom-domain-routes", the status is as following:
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Custom Route:            <customer routes>
Standard Route:          <standard routes>
Route Status:              Activation in progress
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 SAP Cloud Platform Cloud Foundry

404 Not Found, 404 Not Found, Activation in progress, Cloud Foundry , KBA , BC-CP-CF-SEC-DOM , Custom Domain Certificates , Problem