Certificates and Video issue

CERTIFICATES not working
I am on the student dashboard and it says certificates not available,
I created a certificate in the course itself and used a custom certificate

In settings, I also checked enable basic certificate and created one there

VIMEO VIDEOS NOT WORKING ON the SECOND MODULE within
Sometimes I have 2 videos for one module
The first one works
but if I add another Vimeo video it does not show up
A link appears and it says download file

If you refresh it appears. it did not do that before.

Workaround does not work: creating a second unit does the same thing.
Please help