Local Prestashop Development Server Problem

[arkadsolutions]

I am setting up a local dev server for building and testing prestashop sites (PHP7.2, Nginx, & MariaDB).  Server setup went fine. Prestashop installed without any errors.  Store frontend appears to be fine, backend is a mix of working pages, 404 pages and 500 internal server errors.  There doesn't appear to be any pattern to these errors, however, they do appear consistantly ((invoices always comes up with 404, shopping carts always comes up with 500). Below is a list of the pages and errors (just incase someone can see a pattern I cannot).  Any help / ideas welcome.

Thanks - D

Sell
    Orders
        Orders - 500 Internal Server Error
        Invoices - 404
        Credit Slips - OK
        Delivery Slips - 404
        Shopping Carts - 500 Internal Server Error
    Catalog
        Products - 400
        Categories - 500 Internal Server Error
        Monitoring - OK
        Attributes & Feature - OK
        Brands & Suppliers - OK
        Files - OK
        Discounts - OK
        Stocks - 404        
    Customers
        Customers - 500 Internal Server Error
        Addresses - OK
    Customer Service
        Customer Service - 500
        Order Message - OK
        Returns - OK
    
    Stats - OK

Improve
    Modules
        Module Catalog - OK
        Module Manager - 404
    Design
        Theme & Logo - OK
        Theme Catalog - OK
        Pages - OK
        Positions - 404
        Image Settings - OK
        Link Widget - OK
    Shipping
        Carriers - OK
        Preferences - 404
    Payments
        Payment Method - 404
        Preferences - 404
    International
        Localization - 404
        Locations - OK
        Taxes - OK
        Translations - 404
Configure
    Shop Parameters
        General - 404
        Order Settings - 404
        Product Settings - 404
        Customer Settings - 404
        Contact - OK
        Traffic & SEO - 404
        Search - Unformatted page
        Merchant Expertise - OK
    Advanced Parameters
        Information - 404
        Performance - 404
        Administration - 404
        E-mail - 404
        Import - 404
        Team - OK
        Database - OK
        Logs - 404
        Webservice - OK