Magento – Magento2 Fatal error: Interface ‘Iterator’ not found

fatal errormagento2

I am using Magento 2, when i tried to login from frontend , after submitting login this fatal error is showing

Fatal error: Interface 'Iterator' not found in
C:\xampp1\htdocs\magento\vendor\magento\framework\Config\FileIterator.php
on line 15

How to solve this

I have had the same on a local machine and restarting Apache and MySql fixed it.

Make read/write permission for var directory. That means var directory should be 0777.

Install these 2 extention and restart apache

 sudo apt-get install php7.1-dom
 sudo apt-get install php7.1-xml
 sudo service apache2 restart

Note: php version according to your current php version