Some widget error after upgrade

I have upgraded my Piwik installation from .17 to .37 (manually version).
After the update I have some errors (like image)

how can I solve?

It looks like you have a mix of old and new files in your Piwik directory.

You’ll have to install Piwik in a new directory as there were a number of files which were moved (somewhere around 0.2.29).