Issue with MFE_HOST not taking affect

Hello Dears,

Hope someone can help me

I wanted to edit the post to make my issue more clear.

I am facing an issue with the MFE_HOST variable,
I changed it in the config.yml to:

MFE_HOST: then I ran quickstart but as I try to view my demo course
I am faced with a blank page with the following text:

An unexpected error occurred. Please click the button below to refresh the page.

I have checked the logs and my configuration I have found nothing.

Any kind help will be appreciated.

Do you own the domain name indicated by MFE_HOST? Did you configure it to point to your server?