Can´t upload new Podcast

You're not being very specific: do you mean that you are trying to submit it to the iTunes Store and it's being rejected? If so what is the message you get? The feed appears to be OK, apart from the fact that your episodes have no 'itunes:subtitle' or 'itunes:summary' tags, which wouldn't cause rejection but it's advisable to have them.

If you are trying to submit the feed, please go through their validation process and report the results. Go to https://podcastsconnect.apple.com and log in with the ID you use for iTunes. Click the blue '+' sign at top left and enter the feed URL (not the URL of the media file). Click 'Validate' and the page will check for errors.

You should be aware that there are content factors which can get you rejected: these include using strong or sexual language when the 'itunes:explicit' tag is no set to 'yes', or such language in the title or description however the tag is set, unacceptable sexual or inflammatory content (I'm not accusing you of this, just listing the causes), the use of copyright music or recordings without clearance, or the inclusion of Apple's trademarks.

If your problem is something other than a rejected submission you need to explain clearly and in detail what it is.