Configuration of Piwik on new website

I’m new in Piwik. The installation was succes and when in go on Adminisatrion of piwik, i have thos errors:
You need to enable this built-in function.

On a high traffic website, executing the archiving process may require more time than currently allowed. If necessary, change the max_execution_time directive in your php.ini file.

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.
Error: LOAD DATA INFILE failed… Error was:
Try #1: LOAD DATA INFILE : SQLSTATE[28000]: Invalid authorization specification: 1045 Access denied for user ‘u512904048_piwik’@‘’ (using password: YES)[28000]
Troubleshooting: FAQ on

How can I fix all those errors ?

PS:My hosting is