How to fix Fatal error: Call to undefined function mb_split()

Introduction

On this page, we will learn how to fix the TestLink error Fatal error: Uncaught Error: Call to undefined function mb_split(). As a result of this error, you might not be able to login to the TestLink application and use it.

Steps to Reproduce

Open the Testlink login page.

Login with a valid Testlink user.

Actual Result: Fatal error: Uncaught Error: Call to undefined function mb_split()

Error Indication & Screenshot

Fix

Locate the PHP configuration  php.ini file.

Enable the extensions:

extension=mbstring
extension=exif ; Must be after mbstring as it depends on it

Save the changes to the file.

Restart the Apache server or Service.

Launch the Test login page.

Log in as a valid user.

Expected Result: Log in should be successful and no error should be displayed.