Hello Themi,
So sorry for the delay in getting back to you. I checked your issue again with OSEFileman because your FTP does not work. The issue here is with the imap_open not connecting with your mailbox. Did you change the password or something. I will ask again for the login to your mailbox so that I can debug this properly. I want to solve this issue for you but with limited access I won't be able to do much. Please advice.
Thanks!