USMissionNGRA

I had my 221g interview Dec 1, 2018. Up till this moment, it is in administrative processing.

The anticipation of having to check regularly is not easy as my plans to the US is on hold.

May I please ask, what could be the problem?

It is almost 6 months now. Nothing has changed. To the best of my knowledge, all questions were answered correctly.
Please find attached my present situation.
Thank you greatly for your help.