Can you delete all the files tmp/assets/ and try again ?
Also check your server error logs. Also you can upload the old 1.10.1 back, but definitely the beta should work for you
LOAD DATA INFILE
Using LOAD DATA INFILE will greatly speed Piwik's archiving process up. To make it available to Piwik, try updating your PHP & MySQL software and make sure your database user has the FILE privilege.
If your Piwik server tracks high traffic websites (eg. > 100,000 pages per month), we recommend to try fix this problem.