After upgrade to v 2.1.0.rc1 unable to access some of admin content in Sales, Customers, Products, Marketing, Content

[kgvconsulting]

This issue is closed

The issue was created after upgrade from v 2.0.x to v 2.1.0-rc1

during the upgrade db tables for admin site are changed and there are difficulties to access Products, Sales menu(s)

Also as per release notes: http://devdocs.magento.com/guides/v2.0/release-notes/ReleaseNotes2.1_RC1CE.html

this version is not ready for full use yet.

Note:
We did not publish sample data for RC1. Do not attempt to install RC1 sample data or upgrade to RC1 if you already have sample data (you can, however, perform a fresh RC1 installation in a different location in your web server's docroot).