My sticky notes uninstalled itself and I can't reinstall it despite already have windows update turned on as per the suggestion of troubleshooter

[Windows Server]

My sticky notes uninstalled itself and I can't reinstall it despite already have windows update turned on as per the suggestion of troubleshooter-I just need to install this because I've already back-up my sticky notes datas but I can't access it because it's in a microsoft server somewhere. & I can't install it.

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