How can I fix this error and locate my content?

Hello Support,

I want to locate my blog article from Testimonial Menu at the bottom of front page but at the Edit Module settings page, an error shows at the Module tab, like Module XML data not available.

And, in the module list, Testimonial module is set as "No" as display status so, even though I assigned this module to be shown at bottom-c position of the front page but it doesn't show up.

Could you assist me how to resolve this issue?

Thank you very much for your help.

Best,

Brian.