Error when adding the Address contrib module

The address module must be installed with composer.
If you directly add the module it will throw error.

As mahtab_alam correctly says, you will need to manually add address as a requirement when testing on simplytest.me.

This is required because the root composer.json in the geolocation module doesn’t specify an upstream requirement for address. To be honest, this is reasonable as not all users of the geolocation module will want to use the geolocation_address submodule.

I have tested that adding the module by hand works as designed.

You want it to look like this: