Dynamic Content Editor fails to include media

Your software
My Mautic version is: 5.1
My PHP version is:
My Database type and version is:

Your problem
My problem is:

I’m trying to include a youtube video in the Dynamic Content editor and it ok while fetching the thumbnail and inserting in the editor box. BUT when using the DWC the video doesn’t display;

ALSO the insert Media or File button opens a blank window and thats it;

These errors are showing in the log:

no log error;
my folders have right permissions;

Does anyone have the same issue in Mautic 5.1?