The error message "Unable to prerender all routes!" suggests that the prerender-spa-plugin is unable to apply any of the routes to the web server. There could be several reasons for this issue, including:

1. The routes are not defined in your index.html file or other HTML file that you are using to load your application.
2. The routes are not correctly configured in your tsconfig.json file, which specifies the file paths of your application's routing files.
3. The prerender-spa-plugin is not correctly configured to include the routes in the URL that is generated by the server.
4. The prerender-spa-plugin is not correctly configured to listen for changes in the URL that is generated by the server.
5. There is a bug in the prerender-spa-plugin code that is preventing it from properly applying the routes.

To resolve this issue, you will need to check the following:

1. Make sure that the routes are defined in your index.html file or other HTML file that you are using to load your application.
2. Make sure that the routes are correctly configured in your tsconfig.json file, which specifies the file paths of your application's routing files.
3. Check that the prerender-spa-plugin is correctly configured to include the routes in the URL that is generated by the server.
4. Check that the prerender-spa-plugin is correctly configured to listen for changes in the URL that is generated by the server.
5. Check the code for the prerender-spa-plugin to ensure that it is properly handling the URL that is generated by the server.

If you are still unable to resolve the issue, you may want to consult the documentation for the prerender-spa-plugin or seek help from the community.