Web Portal session expired error


I am new to Katalon and we automated some web pages and test cases are executed successfully. However, when I execute all the test cases the portal where it gets executed shows session timeout error.

Per the portal maintenance group, the session times out due to inactivity( keyboard /mouse). How can I fix this?

more information needed:
how you execute tests - setup/configutation/environemnts etc…
what kind of tests are those? UI/API/Other…
what did you try to solve this?