Why can't I sell XRP?

Why is it that I'm unable to sell my XRP? Have I missed a crucial step in the selling process? Is the current market condition unfavorable for selling XRP, or is there some specific regulation preventing the transaction? Could it be an issue with the exchange platform I'm using? Am I required to fulfill certain criteria or meet certain conditions before selling XRP? Is there a limit to the amount of XRP I can sell at a given time? Or is it simply a technical glitch that I need to address? I'm really puzzled about this and would appreciate any clarification.