HERE ARE SOME MORE ENGLISH GRAMMAR MISTAKES:

Incorrect: If I’m stressed out about something, I tend to have problem to fall asleep.

Correct: If I’m stressed out about something, I tend to have trouble / a hard time falling asleep.

This is just a more natural way to express this sentence. We don’t usually use the TO form of a verb after “problem.” If you want to talk about the difficult action, use “trouble” or “a hard time” and then the -ING form of the verb.

Incorrect: One of the most important issue is the lack of parking spaces at the local mall.

Correct: One of the most important issues is the lack of parking spaces at the local mall.

Whenever you use the expression “One of…”, the noun must be plural but the verb must be singular. For example, “One of my friends is sick.” “One of these eggs was rotten.”

Incorrect: If you don’t mind, I’d prefer leave early tomorrow.

Correct: If you don’t mind, I’d prefer to leave / leaving early tomorrow.

Correct: If you don’t mind, I’d rather leave early tomorrow.

After prefer, use TO + VERB or the -ING form. After rather, you can use the base form.