WP-Piwik seems to work well. It is able to get all necessary information and also adds the tracking code as expected.
By checking your pages, I got this error message:
[Error] Failed to load resource: A server with the specified hostname could not be found. (piwik.js, line 0)
By checking the requested URL, I identified the reason: The tracking code seems to open https://henripedia.deanalytics/piwik.js instead of https://henripedia.de/analytics/piwik.js, but in fact it’s using //www.henripedia.de/analytics/. Your blog uses HTTP, so //www.henripedia.de/analytics/ leads to http://www.henripedia.de/analytics/. And this redirects to https://www.henripedia.deanalytics/.
So, please check your (Piwik) server configuration (mod_rewrite?) and make sure piwik.js can be embedded. If your blog is running http, your Piwik server should also be available using http. Alternatively, you can ask WP-Piwik to force SSL (see expert settings, force protocol).
Thanks for checking,
I am sure that mod_rewrite is active. I did set up another instace of Piwik in a non-https-Folder, but again no website visits are counted.
Could you please check the testing result?
http://pastebin.com/xTdccWRH
Thanks!
Michael
Yes, mod_rewrite is active but not correctly configured.
Anyway, the tracking code itself gives not hint on this. Your first page (ems) seems to be unchanged, the other page should work now, the tracking code is embedded and working.
If there are still no counts, you should check your Piwik settings. E.g., are you looking at todays or yesterdays results? Are you using archiving? Etc. If you still get not results, you should ask the Piwik community for further support: http://piwik.org