How can i set a user as Purchase Order manager or viewer?

Summary:

i cannot see or manager purchase order after setting to NO some profile options related to redwood for a test

Content (please ensure you mask any confidential information):

I've set Redwood with profile options, roles and privileges to some users i needed to use and everything worked out. Now I need to do a test without the Redwood implementation so I decided to set to NO every profile option linked to the redwood setup i made. I didn't delete any role or privilege given to my users thinking they wouldn't be affected by some role without their implementation set to Yes.