What computer operating system are you using for your Premiere Elements 12. For now I will assume Windows 7, 8, or 8.1 64 bit.
From the translation I am understanding that you are having a problem downloading "content" for the Titles and Texts choices in Premiere Elements 12.
Is the problem with some or all of the choices? If so, which ones will not download?
Does the problem exist with and without the antivirus and firewall(s) disabled?
Have you and can you download the 12.1 Update for Premiere Elements, using an opened project's Help Menu/Update?
What is the speed of your Internet connection? Have you cleared the Cached Web Content under browser's Options/Advanced/Network?
Have you turned off on on your router (about 45 seconds)?
Have you looked at updating the Adobe Application Manager with antivirus and firewall(s) disabled?
We will be looking forward to your follow up. If any questions or need clarification on the above, please do not hesitate to ask.