Hi Dev,

I have read across the internet about this problem, and apparently you need PHP 5.3 or higher installed, and the PHP intl plugin installed. I have both of these, yet I am still receiving a Fatal error: Class 'NumberFormatter' not found error.So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

You just need to enable this extension in php.ini by uncommenting this line:

extension=ext/php_intl.dll

In this step, We need to install PHP Intl Extension for it. So let's open terminal run bellow command:

sudo apt-get install php7.4-intl

To check successful installation, run the command php -m. This should show the intl package in the list.

I hope it help you...