When you deleted Prota Space app on your device, you also deleted, at the same time, the authorization of your device to access your Prota. This is why, once you reinstalled the app, your Prota does not appear anymore.
To authorize the access to your Prota on this device again, you need to use the access link you received when you first configured your Prota.
To learn more about your access link, please check this article: https://support.prota.info/hc/en-us/articles/235567607-What-is-an-Access-Link-
If the problem persists, please contact our support team.