I updated to 11.16. Don't know if that was a good idea but streetpass didn't so I updated. Never had this problem. does someone know what happened? (I have custom firmware) :
3DS System Update 11.16.0-49 Is Now Live, Here Are The Full Patch Notes | Nintendo Life
Super-SkaterHAX 3DS - (Exploits) - GameBrew
Nintendo New 3DS XL Red System US Ver. 11.16.0-49U Handheld Console w/ Charger | eBay
luma3ds Archives - Sthetix
Nintendo New 3DS XL Red System US Ver. 11.16.0-49U Handheld Console w/ Charger | eBay
Nintendo New 3DS XL Red System US Ver. 11.16.0-49U Handheld Console w/ Charger | eBay
Nintendo 3DS Update 11.16.0-48 patches universal-otherapp | Updating with Luma3DS & Changelog - YouTube