Missing Fonts

[TpiBluePrint]

We have upgraded to InDesign 15.1.1 on Windows Server 2016 and are facing issues of missing fonts -

Missing Avenir Fonts - On opening indesign we get pop up of missing avenir fonts. All these fonts are already installed in system.

Let us know ways to fix this issue.

Thanks

[BobLevine]

InDesign is not supported under Windows Server so it could be anything.

There are plenty of "missing font" discussions here. Have you read through any of them?