Has anyone encounter same situation as me for dxo application? Can anyone advice?

I applied for a Manager post. The HR requested me to upload docs in Form sg. After uploading, HR contacted me saying that documents uploaded were either encrypted or password protected. But i can open these files on my pc and mobile easily. So i emailed all the attachments to HR and asked if it's ok. No reply

Days later, i received auto email remind me to complete application. So i resubmitted using the link from hr. Tried to call her, no one answer. Emailed her, no reply.

Then today, i received auto email again saying that as i did not complete the application for Engineer post, they have removed my application from the system. Anyone knows what happened? Apply for Manager post become Engineer post (jd seems similar but different), and i submitted info but the formsg just refused to take.