Can't edit a campaign

Can't edit a campaign

Hello,

I have created a campaign, but now I can't edit then content.
I see the preview version in html (step 2 - the content), but when I click "Edit Content", it doesn't load the content, it is empty.
I have tried to clone the campaign but it doesn't work, and the campaign can't be cloned.
What is happening?, Can I recover it?

Thanks in advance.

I can see the content at step 2




but after I can't edit the content