I just updated Piwik to I think it was Piwik 2.0.1. However, after the update I get (instead of a proper inlog page) a few warnings and this message:
It appears the composer tool is not yet installed. You can install Composer in a few easy steps:
In the piwik directory, run in the command line the following (eg. via ssh):
I just have a kind of small technical knowledge, is it possible to fix without losing the data I already collected? Hope you can help me, I will give you many thanks in advance