Could you please help me with this? I tried using many different kinds of modules in the left position but it just doesn't show. Right works fine. It is not a problem with the content in the right position, because I tried using different modules in right too, because I thought maybe it is the module I am using at right that doesn't let me see left, but it's not. Left doesn't work at all.

I also tried putting two modules on both left and right. It would show both modules at right ok, but nothing on the left.

Thank you. The website is https://escueladecristointernacional.com

Dear maxinorie,
Maybe you are using main-right layout, Please go to admin site: Extensions-> Template-> your default template and choose other layout: prntscr.com/c1g0sg

Thanks.

You were so completely right. Thankyou so much for your help. It's been years since I didn't change the layout so I totally forgot about that. It works perfect.