Video stimuli on loop error

Hello all!

I am creating an experiment with 1 block on loop that includes 70 videos. I am randomizing them using an excel file, however it gives me this error: oserror: exception: access violation reading 0x0000000000000000

What did you try to make it work?:
I have checked many times the path on my excel file…i changed the slashes to , i have changed the path from c:/ to direct one.

What specifically went wrong when you tried that?:
The videos wont play normally, sometimes it will play 10 videos other time it will play 13, 6, 19, 12 etc…no more than 20.

Please, i am in need of your help!