General developer forum

Moodle 2.4.5

I have 2 instances of Moodle but differents behaviors.

With The first one, I can edit the dashboard, add blocks etc ....; with the second one I don't see any more my blocks, when I edit it I can't see the new blocks list but I see them when I have a look on HTML.

I tried several themes nothing has changed.

I remarked some differences on the structure of the page:

For the first one, I have :

<div id="region-main-box">
    <div id="region-post-box">        
        <div id="region-main-wrap">             
        </div>      
        <div id="region-pre" class="block-region">           
        </div>     
        <div id="region-post" class="block-region">          
        </div>
    </div>
</div>

for the other one:

<div id="region-main-box">
        <div id="region-post-box">  
        </div>  
        <div id="region-pre" class="block-region">           
        </div>     
        <div id="region-post" class="block-region">          
        </div>
   
</div>

I suspect some differences in the config but I can't figure out where.

Any ideas?

Thanks in advance,