Most often this comes down to how your layout is setup and which homepages you've set up for your userroles.
Some examples:
One of the things that pops up in your errors is that you use the deeplink module in (by the looks of it) an anonymous access type of setting. What I see next is that there are microflows in module Account, which refer to subflows from the Service_EBilling module. Since that submicroflow is being triggered, you need access to that module, because the submicroflow probably does some stuff with entities related to that module.