The requested page "/mywebsite/?q=admin%2Fcontent%2Fnode&render=overlay" could not be found When I am logged as an administrator and try to access Content from the administrator menu, the corresponding window pops up, with the add content link, but just below, I get the following error message:

The requested page "/mywebsite/?q=admin%2Fcontent%2Fnode&amp;render=overlay" could not be found.


although content already exists. What is causing this and how can I get rid of it? I am on Drupal 7 release 12. Thanks.

Update

If anyone has ideas, tips, suggestions about what is causing (or could cause) this issue, it is welcome. Could I have modified the config by accident (if yes, which)? Is there a tool (other than FireBug) to debug this issue? I plan to re-install a system from scratch and check whether the error happens too. Thanks.

Update II

Here is what I get when requesting Content from the Administrator menu:



When I click on Amdinistration, I get the following:



First, I notice something strange: an empty entry in the provided list. Why? I don't know.

Second, when I click on Content from this page, I am not facing the issue I reported above. I noticed a difference in the URLs between both methods:

http://www.mysite.com/#overlay=%3Fq%3Dadmin%252Fcontent%252Fnode &lt;- NOT OK
http://www.mysite.com/#overlay=%3Fq%3Dadmin%252Fcontent &lt;- OK
The url you have posted translates to

admin/content/node?render=overlay

This is how the overlay works, which displays a regular page, but adds a param to tell drupal it should be rendered as the overlay (no header, footer etc is rendered).

The problem could be that overlay is disabled, or that the url isn't encoded as it should.

If you use clean urls, you shouldn't see the ?q=...