When trying to access a Content that is available only through an Object State limitation Content is not displayed - Exceptions shown.
At the bottom of the ticket I've included a slight modification that results in a different Exception, but the end result is the same - Content is not displayed in the back office (instead internal server error happens).

Steps to reproduce:
1. Create a new Object State Group - Colors
2. Add two new Object States there - Green and Blue
3. Add a new User - TestUser
4. Create a new Role
5. Assign created user to that Role
6. Assign following Policies to that Role:

• Content: Read (State: Lock:Locked, Colors: Green)
• User: Login
• Section: View
• Content: Edit
• User: Password
• Content: Versionread
• Content: Create
• Content: reverserelatedlist

7. Create a new Article in the back office
8. Assign it the following Object State:

• Lock:Locked
• Color: Green

9. Logout
10. Login as created previously user
11. You should see the created Article in the Dashboard - open it

Expected:
Content Item is displayed - it's in correct Object State that I have permission to.

Actual:
Notification message is displayed: Cannot read property `subitems` of undefined. - not enough intuitive. If you go to edit mode there is an exeption:

An exception has been thrown during the rendering of a template ("User does not have access to 'read' 'content'"). [in vendor/ezsystems/ezplatform-admin-ui/src/bundle/Resources/views/content/locationview.html.twig:51]

What is more, when user wants to display Content Tree, only loading icon appears.

Note:
If in Step 6 you add an additional Limitation: Content: Read (Subtree: Home)
And after Step 8 change Home Object State to "Lock: Locked" and "Color: Green"

Then trying to visit your Article as created user works fine, edit mode as well.