It's not even a verb, it's a preposition! That's like saying "I was on the car" when you mean to say "I was driving the car."

Oh that is hilarious

Try saying that on your job interview.

How anyone can even make this mistake is beyond me, and I'm not even a native English speaker.

I don't know if anyone would spot the difference in a job interview, although it would be wrong in a cover letter. The reason why people make the mistake is because "of" and "have" sound the same.

Non-native speakers often have a better grasp of the grammar of a language than native speakers do, because during the learning process they're more self-conscious and intentional about how they're learning it.