Unsupported project in WebIDE, and project type settings

Sometimes when adding project into the Web IDE workspace, you may face a strange behavior in the project itself after its import. Basically, project settings might not be configured adequately turning project not legible for deploy.

Symptom

Not able to deploy an UI5/Fiori application in the ABAP backend. A Unsupported project message is shown during deployment.

Reason and causes

Main causes are:

Missing properties in manifest.json
Wrong key/pair values in manifest.json
Project type is not yet set.

Solution

First approach: Access manifest.json file using Code Editor option.

(right click on manifest.json, then Open Code Editor);Under tag sap.app, property type should appear with value "application"
Seconds approach: Edit your project settings, and select SAP Fiori type

(right click on project, then Project > Project Settings);
(check SAP Fiori on Project Types)