PHPList Console is too Slow

We have installed the PHPList (v3.6.2) on Linux Server, After the installation each action in the PHPList Dashboard is taking around 4Minutes. Able to access mysql, apache index pages. But the PHPList Dashboard only taking more time.

We Re-installed but still the issues are there and not found any errors in the log. Please help to resolve this slowness issue.

Thanks in Advance!