Possibility of travel ban in the GCC for an unpaid loan in the UAE

Good day.

My husband has a loan with a UAE bank. He has left the UAE a few years ago and has not paid the monthly payments.

Therefore the bank already approved to file a police case against him. He wants to visit one of the GCC countries for business and he wants to work there.

Thus he has contacted the bank to ask for rescheduling a new monthly payment plan and clear the police case. However, the bank wants to have the total amount of his loan.

I've heard that if someone has a financial police case in the UAE and when travelling to GCC countries, he will be arrested in any of the GCC countries airports, is it true?

Would it be possible to clear the police case and negotiate with the bank through a lawyer?

If it's possible, how long does it take?

Please advise,

Thank you.

Regards, E. B.