Just as a quick note, are you running the installer within ISE or within PowerShell?
As described in Windows Standard Deployment | Bitwarden Help Center
Note
Using the Powershell ISE to run Powershell commands will cause the Bitwarden installation to fail. Completing a successful install will require Powershell.
I would also remind you that you can contact the official support team as well for more advanced issues such as this.
Or anything really for that matter, and they are always more than happy to help. 