[Neos] Could not read page metadata from response. Please open the location error message

[Christian Müller]

Hi,

Dominic Garms wrote:
> Hello,
>
> What exactly does this error message mean:
>
> Could not read page metadata from response. Please open the location
> (...) outside the Neos backend.

That normally means the metadata that we render when logged in was not 
found by Neos.
Check prototype(TYPO3.Neos:Page).neosBackendDocumentNodeData
in 
Packages/Application/TYPO3.Neos/Resources/Private/TypoScript/Prototypes/Page.ts2

>
> I have this error currently on all subpages of my Neos backend. If I
> open the locations outside of Neos there is no additional error, but as
> I can't edit the content the pages remain empty.


In the rendered html you can find this metadata at the top (if the page 
works correctly in the backend) just after the opening body tag. So 
first see if the metadata is not appearing on the pages that give the 
error and then you could try to find why that happens.

> There is no additional error inside of the server log, its very hard to
> find out which *.yaml, *.ts2 or html template is responsible for this
> error. Is there any technique I can use to tackle this issue? Is there
> some sort of reset possible to clean up all nodes with the current
> configuration?

It is probabably an issue with your TypoScript. As this is (pretty 
certainly) no error in the nodes itself but in the TypoScript there is 
no reset. You could use the default demo site TS to render your nodes 
and see if the same happens.

Cheers,
Christian