Editor screen is blank after making a page a child page of a parent page

[davedenis]

Describe the bug
Editor screen is blank after making a page a child page of a parent page.
Possible dupe or related to #8534 and #8455.
Gutenberg Version: 3.7.0

To Reproduce
Steps to reproduce the behavior:

1. Go to page.
2. Click on Page Attributes -> Parent and select a page.
3. Page loads with just the top and left nav and blank body.
4. It is possible to load the page under Classic Editor, change the page back so it is no longer a child page and it will work again.

Expected behavior
Gutenberg editor expected to load.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: macOS 10.12.6
• Browser: Chrome 68.0.3440.106
• Gutenberg Version: 3.7.0

[ianbelanger79]

Hi @davedenis,

Thanks for your report. However, I am unable to recreate the issue. I am using GB 3.7, Chrome 68.0.3440.106 and Windows 10 OS. I'm not sure why this would work on Windows and not on a Mac. I will see if someone else with a Mac can test this. @0aveRyan or @earnjam could you test this on your Mac's?

[davedenis]

I can confirm Classic Editor loads fine. It's only when I switch to Gutenberg on a page that has been moved to a child page. I thought it was maybe a permalink issue.

[designsimply]

I tested loading a child page using Chrome on macOS and I was unable to see the problem described.

^{Seen at http://alittletestblog.com/wp-admin/post.php?post=14775&action=edit using Chrome 69.0.3497.92 on macOS 10.13.6.}

Click on Page Attributes -> Parent and select a page.

To confirm, does the problem only happen when you make a change such as selecting a parent page or does the problem also happen if you re-open a page that already has a parent page set?

Page loads with just the top and left nav and blank body.

Are you able to check the web console in your browser developer tools to see if any error messages appear there at the time you see the blank screen happen?

[designsimply]

I thought it was maybe a permalink issue.

Is the problem only happening for certain parent/child combinations or does it happen for any child page?

[Keized]

Hi

I have the same problem for any child page,
I have this javascript error :

TypeError: Cannot read property 'models' of undefined : react-dom.min.82e21c65.js:110 TypeError

Uncaught (in promise) TypeError: Cannot read property 'models' of undefined : index.js?ver=1538037426:1

[youknowriad]

I can't reproduce this. I'm going to close this as stale. Let's reopen if we find reproducible steps to investigate more. Thanks.