After 3.1 Upgrade Piwik Stopped Working

After automatically trying to update piwik to 3.1 I cannot access or use it and all I see is this:

What can I do to make this works again?

Hi,
There seem to be other people having this issue:

Can you maybe check the php error log to see if there are more details (in which file does the error occur)

My error file looks something like this:

[16-Oct-2017 10:47:07 UTC] PHP Parse error: syntax error, unexpected end of file in /home/xxxxxxxxxxxxxr/public_html/stats/plugins/Referrers/Columns/Base.php on line 417
[16-Oct-2017 10:47:08 UTC] Error in Piwik: syntax error, unexpected end of file
[16-Oct-2017 10:47:33 UTC] Error in Piwik: syntax error, unexpected end of file
[16-Oct-2017 10:48:06 UTC] Error in Piwik: syntax error, unexpected end of file
[16-Oct-2017 10:48:17 UTC] Error in Piwik: syntax error, unexpected end of file

I have replaced the current Base.php file with a fresh one from a piwik installation package but the error still remains

Managed to solve this by replacing the Base.php file from a fresh install - when I copied the file earlier it didn’t keep the caps “B” and this is why it didn’t work.