Make a copy of piwik with database don't work

Hello, i have make a copy of my piwik installation and a copy of the piwik database.

/piwik/ -> /piwiktest/
user_piwik -> user_piwik_test

Manually changed settings
/piwiktest/config/config.ini.php
dbname = “user_piwik_test”

Automatically changed settings
database user_piwik_test -> piwik_option
option_name option_value autoload
piwikUrl https://www.example.com/piwiktest/ 1

Login works fine, but the display of the reports and some pages in the settings area does not work.

Hi,

Did you check the error log in your browser’s developer tools and the php error log?

Thanks for the hints.
It just worked today, except for a newly installed plugin.
Maybe a hiccup.