When linux installs phpmyadmin, why is it blank? Thank you!

when linux installs phpmyadmin, it is installed successfully, but when it is typed by the browser, it is really blank. How to solve it? Thank you, dear

Environment description:
php-5.3.5
phpmyadmin-4.7
CentOS release 6.9 (Final)

Mar.18,2021

install the php extension php-mbstring
1, sudo yum install php-mbstring
2, restart apache,sudo service httpd restart

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