Ffmpeg error with h264_nvenc

Hi,

From two months I can’t run ffmpeg encoding with hardware acceleration. Firstly on Manjaro and then I reinstall it to Fedora. I have Nvidia GTX 1660Ti. When I run for example:

sudo ffmpeg -i avengers.mp4 -c:v h264_nvenc -b:v 1M output.mp4

I always got this error:

[h264_nvenc @ 0x56418fcbfb40] dl_fn->cuda_dl->cuInit(0) failed -> CUDA_ERROR_UNKNOWN: unknown error
Error initializing output stream 0:0 – Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

Few times I have error that device is not CUDA capable but how is it possible (I have newest LTS drivers).

My nvidia-smi output:

+-----------------------------------------------------------------------------+
| NVIDIA-SMI 450.80.02    Driver Version: 450.80.02    CUDA Version: 11.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  GeForce GTX 166...  Off  | 00000000:08:00.0  On |                  N/A |
|  0%   43C    P8    15W / 140W |    489MiB /  5941MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|

FFmpeg version:
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers

What is an issue? Always it’s work and from 2-3 months dosn’t work and I can’t work with hardware acceleration.
I really please for help.