Hi,
We have announced many times in the past few months that at the end of January 2024, we are stopping support for AcyMailing 5 and that we won't provide support for it after that date.
I am afraid that I have to decline support for AcyMailing 5 in your case.
We have explained how to migrate your installation to version 9 in the following series of articles
https://docs.acymailing.com/setup/migration
https://docs.acymailing.com/setup/installation
Thank you for your understanding!