You were cited for no front plate. If you show proof of correction, it will usually be dismissed for a small administrative fee (usually $ 10-20). Without proof, it remains as a fine. However, you fail to appear on the date stated on your ticket to either show proof of correction or to pay uncorrected. When you failed to appear, the court added a misdemeanor failure to appear charge.
I suggest to go to court ASAP and schedule a hearing date. If this is your first FTA, ask the court to reduce it from a misdemeanor to an infraction. Most likely, you will be required to pay of a fine for the FTA.