dotnet new my-template does not create output files

I am trying to create a template for some dotnet/react based boilerplate: https://www.nuget.org/packages/JBuschke.Glue.Starter/. After installing via dotnet new -i JBuschke.Glue.Starter::* and running dotnet new gluestarter (the templates short name), no output files are created. Only some help output, the projects description and author are logged to the console:

dotnet new gluestarter
Usage: new [options]

Options:
  -h, --help          Displays help for this command.
  -l, --list          Lists templates containing the specified name. If no name is specified, lists all templates.
  -n, --name          The name for the output being created. If no name is specified, the name of the current directory is used.
  -o, --output        Location to place the generated output.
  -i, --install       Installs a source or a template pack.
  -u, --uninstall     Uninstalls a source or a template pack.
  --nuget-source      Specifies a NuGet source to use during install.
  --type              Filters templates based on available types. Predefined values are "project", "item" or "other".
  --dry-run           Displays a summary of what would happen if the given command line were run if it would result in a template creation.
  --force             Forces content to be generated even if it would change existing files.
  -lang, --language   Filters templates based on language and specifies the language of the template to create.


Opinionated ASP.NET Core + React boilerplate (C#)
Author: Jannik Buschke
    (No Parameters)

the template.json:

{
  "$schema": "http://json.schemastore.org/template",
  "author": "Jannik Buschke",
  "classifications": ["AspNetCore", "React"],
  "groupIdentity": "JBuschke",
  "identity": "JBuschke.Glue.Starter",
  "name": "Opinionated ASP.NET Core + React boilerplate",
  "shortName": "gluestarter",
  "tags": {
    "language": "C#",
    "type": "project"
  },
  "sourceName": "TemplateName",
  "preferNameDirectory": false
}

the nuspec file:

<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
  <metadata>
    <id>JBuschke.Glue.Starter</id>
    <version>0.9.3</version>
    <description>
    Opinionated Asp .Net Core + React template
      https://github.com/jannikbuschke/glue-reactnetcore-template
    </description>
    <authors>Jannik Buschke</authors>
    <packageTypes>
      <packageType name="Template" />
    </packageTypes>
  </metadata>
</package>

The cached packages ~\.templateengine\dotnetcli\v2.2.104\packages\jbuschke.glue.starter.0.9.2.nupkg\ content looks alright to me:

/JBuschke.Glue.Starter.nuspec
/content/.template.config/template.json
/content/<template-files>

[jannikbuschke]

My problem was that I had two templates with the same “groupIdentity”.

[jannikbuschke]

The weird thing is, the template actually seems to work.

dotnet new -i JBuschke.Glue.Starter::*
dotnet new gluestarter

correctly initializes the project.

However I have a second template (different content, different id) JBuschke.AspCra which if installed causes both templates to fail (no output for both).

If I only install one of them it works.

{
  "$schema": "http://json.schemastore.org/template",
  "author": "Jannik Buschke",
  "classifications": [
    "AspNetCore",
    "React"
  ],
  "groupIdentity": "JBuschke",
  "identity": "JBuschke.Glue.Starter",
  "name": "Opinionated ASP.NET Core + React boilerplate",
  "shortName": "gluestarter",
  "tags": {
    "language": "C#",
    "type": "project"
  },
  "sourceName": "TemplateName",
  "preferNameDirectory": false,
  "defaultName": "MyApp"
}