"Something went wrong" warning on login with no roles is too generic

[twinfees]

Users logging into a silo for the first time can be met with a generic "something went wrong" warning, which seems to be the defacto warning for misconfigured role assignment.

Opening this issue to request a more clear warning to the user to prevent confusion if they're not yet authorized (i.e. user not added to the group that was assigned to the silo admin group, etc).