login first time in katalon studio

when login first time from katalon studio show "please make sure your credential is valid

Hi @mohamedaliacu0, welcome to Katalon Community.

Thank you for sharing this with us. I would say that the problem coming from the reason of network security errors.

For Katalon Studio below 8.2.5, you need to whitelist this domain for online license authentication. It is also used to access Katalon TestOps and enable Katalon Studio - TestOps integration.

More details are here Network security errors | Katalon Docs.

Hope this helps!