Hi @brt.ralsiblani. Welcome to our Community and thank you for your interest and joining our Certification Program.
To use KRE, a license is required. That said, upon your account registration, you will have a 30-day trial to use it. You can leverage this period to achieve the certification.
You can also get a free KRE license with the Katalon Community’s Kudos Reward Scheme (earning Kudos points by interacting in the Community and exchanging them for licenses). More information here.
Hope my answer helps.