Corrupt RSS Feed?

I do have a trouble with my Feed my self, but I am not able to solve this Issues, and I dont know where to look for any answers or options. Is this something you can look in to Sir?

At the https://feedvalidator.org they tells me that there is six different Issues that conserns the blog. I can not ping my blogsite because, the error message is, “we can not read you feed”.
vargas12.com/ Oyvind