Front Camera error can't open

Front Camera error can't open //mokee-discourse.s3.dualstack.ap-northeast-1.amazonaws.com/optimized/2X/2/232e8cc29b25682a0f3c30a3a2452cf767502290_2_576x1024.png
none 3.0 1

Please fix on rom 7.1 HM Note 1s gucci. Camera front can’t open, and can’t use to video call on WhatsApp.

Yes please fix this soon as possible also the mobile data problem sometimes it will on but not showing any 3G 4G connectivity and speed