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  7. Media Manager Error: Invalid backend response. Data is not JSON.

Media Manager Error: Invalid backend response. Data is not JSON.

  • Terry Pierce
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5 years 8 months ago #172985 by Terry Pierce
Media Manager Error: Invalid backend response. Data is not JSON. was created by Terry Pierce
Hello - I'm getting this error when trying to use the Media Manager:

Invalid backend response.
Data is not JSON.
The most recent request was denied because it had an invalid security token. Please refresh the page and try again.

I'm running the most recent Joomla & K2 versions and have tried disabling error reporting but still get the message.
Any other recommendations would be appreciated!

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  • Terry Pierce
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5 years 7 months ago #172999 by Terry Pierce
Replied by Terry Pierce on topic Media Manager Error: Invalid backend response. Data is not JSON.
^ Bump ^

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5 years 7 months ago #173018 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
If some system plugin is not throwing a PHP warning in raw Joomla outputs (which K2 uses for outputting JSON), try updating to K2 v2.10 (dev) from: github.com/getk2/k2/archive/master.zip

In any case, open your browser's dev tools console and check the errors displayed...
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3 years 11 months ago - 3 years 11 months ago #178857 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
Hi

I'm starting to get this error too and I'm on K2 v2.10.3
Any advice?

The only error I get is:
Missing: www.sawo.dk/da/administrator/css/theme.css

Regards
Thomas
Last edit: 3 years 11 months ago by Thomas Thrane.

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3 years 11 months ago #178869 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
Switch error reporting to "none" in Joomla's Global Configuration. Does the issue still occur?
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3 years 11 months ago #178884 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
Yes it does - and I have cleared the cache completely.

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3 years 11 months ago #178905 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
The error you mentioned is not really an error though, nor is it related to K2.

You need to open up your browser's dev tools, switch to the Network and then perform any actions. There you should see the AJAX actions of the file manager and in there you'll spot the issue.
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3 years 11 months ago #178926 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
Thanks!
So it's the last line, that causes the issue?

 
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3 years 11 months ago #178933 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
I don't get more errors than the above mentioned, and that error I see on every site I make, but not the JSON error :-(

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3 years 11 months ago #178934 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
We get an invalid backend response when trying to access the MediaManager

The error happens in this request: /administrator/index.php?option=com_k2&view=media&task=connector&ff86b844a34b8546e70305cf82b5b429=1&cmd=open&target=&init=1&tree=1&_=1621427068790

Accessing this URL directly in the browser with an active admin session, responds with the following errormessage: "The most recent request was denied because it had an invalid security token. Please refresh the page and try again."

At the same time we get errors in PHP error log:
[19-May-2021 16:30:28 Europe/Copenhagen] PHP Notice: Trying to get property 'alias' of non-object in D:\wwwroot\components\com_k2\router.php on line 292
[19-May-2021 16:30:28 Europe/Copenhagen] PHP Notice: Trying to get property 'id' of non-object in D:\wwwroot\components\com_k2\router.php on line 316

Site is running on IIS 10, Windows 2019
PHP version: 7.4.16 NTS
K2 version: 2.10.3
Joomla version: Joomla! 3.9.26 Stable [ Amani ] 13-April-2021 15:00 GMT
MySql database version: 8.0.19

Please advise.

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3 years 11 months ago #178957 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
Ah, IIS... Feeling adventurous I guess...

Please try v2.10.4 (dev) from getk2.org/downloads/?f=K2_Development_Release.zip - you can safely upgrade.
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3 years 11 months ago #178962 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
My customer is :-)

Tried the DEV, but same error ...

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3 years 11 months ago #178964 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
OK, one more thing. It's most likely that IIS is not configured to understand JSON, in other words, the proper content-type header is simply not set. Examine the JSON response in the Network tab and you should see the raw headers sent there.

Paste it back here.
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3 years 11 months ago #178966 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
Not sure what to look for there - I don't see any JSON mentioned?

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3 years 11 months ago #178968 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
The URL is index.php?option=com_k2&view=media&task=connector&...

Look for that.
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3 years 11 months ago #178969 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
Nothing?
 
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3 years 10 months ago #178983 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
Use Chrome please. It's much easier to work with.
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3 years 10 months ago #179004 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
From Chrome
I don't see any JSON there?

 
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3 years 10 months ago #179008 by JoomlaWorks
Replied by JoomlaWorks on topic Media Manager Error: Invalid backend response. Data is not JSON.
Filter the "XHR" responses and reload the page.

Does Chrome report anything else in its "Console" tab?
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3 years 10 months ago #179010 by Thomas Thrane
Replied by Thomas Thrane on topic Media Manager Error: Invalid backend response. Data is not JSON.
Not much there ...
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