EasyBlog composer is not displayed at the Front-End

Hi!,
I've been having an issue with the Front-end Composer.

I'm currently testing the new version of Easyblog in my testing site, (before updating in the real site). Also, the test site has the new version of Joomla.

When I try to edit a post directly in the blog (I clicked on the yellow pencil icon), the composer never loads.

I hope you can help me. (I'm attaching some pictures of the issue)

Thanks in advance!