I was able to fix it by running the database script that creates the table Nop_CustomerRole, and all other commands regarding that table.
There are 2 files you need to look into. One creates the databases, the other inserts the initial data.
On the first file, you copy all statements that include the table name above, then copy the script from the second file to insert the row in that table right after the table creation. Execute your script and enjoy.
Here's the script.
CREATE TABLE [dbo].[Nop_CustomerRole](
[CustomerRoleID] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](255) NOT NULL,
[FreeShipping] [bit] NOT NULL,
[TaxExempt] [bit] NOT NULL,
[Active] [bit] NOT NULL,
[Deleted] [bit] NOT NULL,
CONSTRAINT [PK_Nop_CustomerRole] PRIMARY KEY CLUSTERED
(
[CustomerRoleID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 80) ON [PRIMARY]
) ON [PRIMARY]
GO
SET IDENTITY_INSERT [dbo].[Nop_CustomerRole] ON
INSERT [dbo].[Nop_CustomerRole] ([CustomerRoleID], [Name], [FreeShipping], [TaxExempt], [Active], [Deleted]) VALUES (1, N'Global Administrators', 0, 0, 1, 0)
INSERT [dbo].[Nop_CustomerRole] ([CustomerRoleID], [Name], [FreeShipping], [TaxExempt], [Active], [Deleted]) VALUES (2, N'Staff', 0, 0, 1, 0)
INSERT [dbo].[Nop_CustomerRole] ([CustomerRoleID], [Name], [FreeShipping], [TaxExempt], [Active], [Deleted]) VALUES (3, N'Favorite Customers', 0, 0, 1, 0)
INSERT [dbo].[Nop_CustomerRole] ([CustomerRoleID], [Name], [FreeShipping], [TaxExempt], [Active], [Deleted]) VALUES (4, N'Content Managers', 0, 0, 1, 0)
SET IDENTITY_INSERT [dbo].[Nop_CustomerRole] OFF
GO
ALTER TABLE [dbo].[Nop_ACL] CHECK CONSTRAINT [FK_Nop_ACL_Nop_CustomerRole]
GO
ALTER TABLE [dbo].[Nop_ACLPerObject] CHECK CONSTRAINT [FK_Nop_ACLPerObject_Nop_CustomerRole]
GO
ALTER TABLE [dbo].[Nop_Customer_CustomerRole_Mapping] CHECK CONSTRAINT [FK_Nop_Customer_CustomerRole_Mapping_Nop_CustomerRole]
GO
ALTER TABLE [dbo].[Nop_CustomerRole_Discount_Mapping] CHECK CONSTRAINT [FK_Nop_CustomerRole_Discount_Mapping_Nop_CustomerRole]
GO
ALTER TABLE [dbo].[Nop_CustomerRole_Discount_Mapping] CHECK CONSTRAINT [FK_Nop_CustomerRole_Discount_Mapping_Nop_Discount]
GO
ALTER TABLE [dbo].[Nop_CustomerRole_ProductPrice] CHECK CONSTRAINT [FK_Nop_CustomerRole_ProductPrice_Nop_CustomerRole]
GO
ALTER TABLE [dbo].[Nop_CustomerRole_ProductPrice] CHECK CONSTRAINT [FK_Nop_CustomerRole_ProductPrice_Nop_ProductVariant]
GO