Fix disable 2fa bug (go-gitea#32320) (go-gitea#32330)

Backport go-gitea#32320

Author: lunny

routers/web/user/setting/security/2fa.go

@@ -33,8 +33,9 @@ func RegenerateScratchTwoFactor(ctx *context.Context) {
 		if auth.IsErrTwoFactorNotEnrolled(err) {
 			ctx.Flash.Error(ctx.Tr("settings.twofa_not_enrolled"))
 			ctx.Redirect(setting.AppSubURL + "/user/settings/security")
+		} else {
+			ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err)
 		}
-		ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err)
 		return
 	}
 
@@ -63,8 +64,9 @@ func DisableTwoFactor(ctx *context.Context) {
 		if auth.IsErrTwoFactorNotEnrolled(err) {
 			ctx.Flash.Error(ctx.Tr("settings.twofa_not_enrolled"))
 			ctx.Redirect(setting.AppSubURL + "/user/settings/security")
+		} else {
+			ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err)
 		}
-		ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err)
 		return
 	}
 
@@ -73,8 +75,9 @@ func DisableTwoFactor(ctx *context.Context) {
 			// There is a potential DB race here - we must have been disabled by another request in the intervening period
 			ctx.Flash.Success(ctx.Tr("settings.twofa_disabled"))
 			ctx.Redirect(setting.AppSubURL + "/user/settings/security")
+		} else {
+			ctx.ServerError("SettingsTwoFactor: Failed to DeleteTwoFactorByID", err)
 		}
-		ctx.ServerError("SettingsTwoFactor: Failed to DeleteTwoFactorByID", err)
 		return
 	}