Can't figure out what's wrong, Total Videos Imported: 0

Hi mpraetzel!

I can’t get your plugin to work and I’ve read most of the topics in this support forum, googled the problem, read your FAQ.
The problem I have is that the plugin isn’t importing the videos into my database. It isn’t a problem with a feed, I’ve tried three different feed with same results; the items in the feed can be found but can not be imported.
The file in /wp-content/cache/ayvpp.txt is set to 777.

Below is the result I get when trying to import a feed, it finds the video-id but an error occurs when importing. Do you have any idea what could cause this?

Total Videos Imported: 0

Attempting to download videos 1 through 50 from channel: "deTEDvdParre"

Feed URL for this query: https://gdata.youtube.com/feeds/api/users/deTEDvdParre/uploads?orderby=published&max-results=50&start-index=1

Error: adding video "VOHkmkWxjGs"
Error: adding video "MbMbVwqLgB0"
Error: adding video "sgqPWFsXwDU"
Error: adding video "aoI-fD4KHg0"
Error: adding video "hFVmHmTk0Ws"
Error: adding video "rSTqZSkOnFw"
Error: adding video "KUKnAaBq1iY"
Error: adding video "CKyApvLQ0jo"
Error: adding video "vnYTgLAQhMk"
Error: adding video "TgmphIxR3Gg"
Error: adding video "-jduD80MVyI"
Error: adding video "Rr4uqeWg1h4"
Error: adding video "Fny44R3Qgpk"
Error: adding video "a9FhfYmgjDE"
Error: adding video "TSr0-vvfj2g"
Error: adding video "eUXxspJAKIA"

https://www.ads-software.com/extend/plugins/automatic-youtube-video-posts/

Edit. Some extra information. I’m using a custom theme (but I don’t think that could cause a problem) and I’m at the 100000283th post (made a mistake while modifying the database).

Edit. Reinstalled but no cigar. Manual install using zip, still no cigar.