PageSpeed Insights reports an error .. but no details on why PSI is having problems

[Sigurður Guðbrandsson]

Google PageSpeed Insights has a problem with one of my client's websites: www.searchscientists.com

Whenever I try to create a PSI report, I get "An error occurred while fetching or analyzing the page."

I also tried the API, but I got the following JSON response:

{

 "error": {

  "errors": [

   {

    "domain": "global",

    "reason": "internalError",

    "message": "An error occurred while fetching or analyzing the page."

   }

  ],

  "code": 500,

  "message": "An error occurred while fetching or analyzing the page."

 }

}

Some subpages show a PSI report, but the frontpage doesn't ... 

Can anyone help me figure out why this is happening?

Thanks :)

[Dave Mankoff]

Howdy Sigurður.

Our renderer is having a tough time with that page. I am not entirely sure that is going wrong.

I do notice that your site is giving an error about using document.write in an asynchronous script. This is a not allowed and may be causing the problem:

conversion.js:19 

Failed to execute 'write' on 'Document': It isn't possible to write into a document from an asynchronously-loaded external script unless it is explicitly opened.

I found the following documentation that talks about using conversion_async.js instead of conversion.js:

https://developers.google.com/adwords-remarketing-tag/asynchronous/

-dave

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[Sigurður Guðbrandsson]

Hey Dave,

Thanks for the response.

Yeah, I noticed the same thing. The client uses Google Tag Manager to add the Google Adwords conversion script - I'll ask him to check his Tag MAnager and see if he has some manual AdWords scripts.

I'll let ya know if that's the problem.

/Siggy

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[Sigurður Guðbrandsson]

Hey Dave,

To check if this was the case, I removed the Google Tag MAnager tag .. the JS warning goes away, but PSI is still unable to render the page (or give results).

So that's not the issue :(

Short of ripping the page apart, piece by piece, I have no idea what can be causing this in PSI.

Dave, do you have access to the PSI logs?

/Siggy

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[Sigurður Guðbrandsson]

Hmm .. I am sometimes able to get the desktop score to display, but it seems that this is being caused in the mobile part.

I tried accessing the website from my android mobile phone, and it worked properly (using the built in "Internet" browser).

Any ideas?

/Siggy

On Wednesday, October 29, 2014 2:20:48 PM UTC, Dave Mankoff wrote:

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