Error code 46 means the Valorant platform is down for planned downtime while Riot's engineers work on the game systems. It is not a problem with your PC, your account, or your connection, and there is no local fix for it.
If error 46 is still showing long after the posted maintenance window ended, restart the Riot Client and the PC, since a stale session can keep showing the downtime message. If it persists after that, check the status page again, since maintenance is sometimes extended without much notice.
How long does platform downtime last? It depends on the maintenance. Most planned windows last a few hours, often around a patch or a new season, and the status page gives the expected time.
Is error 46 a ban? No. It means Riot took the platform down for maintenance, and every player sees the same code until it is back.
Can I play while error 46 is showing? No. The platform is offline during the downtime, so logins and matches are unavailable until Riot brings it back.