Hi, there! Recently some users have reported that they are unable to use dlss 3.5 client 2.6.1.0405.
If your system is win 11, then this problem may be caused by the difference of registry between win 11 and win 10. Please turn off hardware acceleration in graphics settings and turn it on again, it can solve this problem.
If your system is not Win 11, please contact support staff to solve your problem.