7staroptions said I need to pay an 'insurance fee' before withdrawing.

I was told by 7staroptions that in order to protect my funds during the withdrawal process,Is MT4 platform legal in China I need to pay a $1,500 “insurance fee.” This is the first time I’ve been asked for such a fee, and I was never informed about it during the registration process. No other trading platform I’ve worked with has ever asked for an “insurance fee” before releasing funds. This seems like a fabricated charge designed to stall or block the withdrawal process. Has anyone else encountered this? Should I pay it, or is this a scam?