Why "me don't" is incorrect

What kind of error is it?

Pronoun case error involving the misuse of the objective pronoun "me" as a subject.

Why do people make this mistake?

People might use "me" instead of "I" due to informal speech patterns, regional dialects, or influence from languages where the distinction between subject and object pronouns is less rigid. In casual conversation, some individuals may not strictly adhere to standard grammatical rules, leading to such errors.

What is correct?

The correct usage is "I don't," employing the subject pronoun "I" with the verb "don't." In standard English grammar, "I" serves as the subject of the sentence, while "me" functions as the object.