The HTTP 500 error is a current known problem with the Premiere Elements built in YouTube feature. It is affecting many versions of the product on more than one computer operating system. The issue is presenting as a YouTube server issue needing correction by YouTube. Please read other threads here on the issue.
For now, please try to use the workaround where you export your Timeline to an AVCHD.mp4 file saved to the computer hard drive and then upload the file to YouTube at the YouTube web site. Does that work for you?
Right now, cause unknown. As an aside, have you updated 12 to 12.1 using an opened project's Help Menu/Updates? And, what computer operating system is involved?
this problem still exists with version Adobe Elements 12.1
We still updated to the latest version from update feature in adobe elements.
when will this problem be solved ? Is this problem still known by adobe ?
cause we have no premium support and its an basic problem we hope adobe can solve it as fast as possible.
an answer would be delighted. thanks in advance.
This is not Adobe. Rather essentially user to user. The frequency of the Adobe presence in this forum is undefined. And, we do not have any insights into Adobe's involvement in all this. At the moment, with the HTTP 500 error, the odds are going in the direction of YouTube issue that YouTube needs to resolve.
Please also follow the other thread on this matter
Please also refer to my post today at photoshop.com Current HTTP 500 errors for Premiere Elements built in YouTube feature
For now, until this is sorted out, you should be able to export your Premiere Elements Timeline to an AVCHD.mp4 file and then upload that file to YouTube at the YouTube web site. That is working at the present time by all accounts.