Hi nauna,
The "I'm not a robot" Checkbox requires the user to click a checkbox indicating the user is not a robot.
This will either pass the user immediately (with No CAPTCHA) or challenge them to validate whether or not they are human.
No, you can't skip it. If the basic reCaptcha method fails then it has to do something to provide protection.
The users of your application will not see the images method very often.
Since you are doing testing and trying the same things again and again after doing some code changes, thus you get the reCaptcha failing.