Error installing Power BI Server - URLACL

[ChuckB_UK]

I get this error whilst trying to install. (March 2018)

1|Reserving Urls for application ManagementService
1|Reserving url http://+:8083/
1|Install Step Microsoft.BIServer.Setup.RegisterUrlAclsStep threw exception. System.ComponentModel.Win32Exception (0x80004005): The system cannot find the file specified
   at Microsoft.BIServer.Configuration.Http.UrlReservationManager.ReserveAndDeleteIfExists(String url, String securityDescriptor)
   at Microsoft.BIServer.Configuration.UrlApplications.RegisterAll()
   at SetupEngine.Install()

1|Attempting to roll back...
1|----| Uninstall SkuStep |----------------
1|----| Uninstall SkuStep | END |----------
1|----| Uninstall CatalogStep |----------------

Its a win server 2012R2 box

.NET 4.7

SQL2016 ENT

SQL2017 ENT Reporting services

Can anyone help?

Apologies if this has come up as a repost - the forum tells me my previous posts have posted but I can't see them anywhere.

[ChuckB_UK · Accepted solution]

Ok, so I solved this in the end.

Power BI will NOT install if you have anything (such as existing Reporting services instances) on port 80 or 8083

Use NETSH to identify any clashes.

It doesn't mind the temporary listeners reservation on 80.

We have several instances and 8083 had a conflict that the installer wasn't able to resolve, once moved to other ports, the install sailed through.