Consumer Portal does not start and there are (apart of others) 'Given crs was not provided by any of configured providers' errors in browser developer tools console.
If you open Network tab, on the developer console and refresh the page, you might observe some initial requests sent to the Backend, e.g.:
You should inspect those calls responses as the error message above indicates something's wrong with the Backend.
Simplest test for the Backend functionallity is sending this request via browser's address bar:
If you see a blank page, the cookie should have been set -> Backend works
Consumer Portal depends on Backend and BackendWMPS IIS applications that should be created after installation by the Configuration Wizard. In some cases, mainly during upgrade installations, these components might not be populated properly. Check IIS if you have both Backend and BackendWMPS applications created, if not:
If you can't find the Backends folders, neither zipped under C:\Program Files\Common Files\Hexagon\Services\AdminInstances, you will likely need to repair GeoMedia WebMap (or Geospatial Portal) installation.