I had the same error. It turned out to be NVIDIA-related.
At the error, press CTRL + ALT + F2 to get into tty. Log in.
This is what I did to fix it:
My card is not old GTX1050Ti.
Execute, mhwd -a pci free 0300
I used pamac to remove any existing NVIDIA drivers, and then used pamac search -r nvidia to find the latest drivers (460.32.03-3). I installed the linux54-nvidia package because I’m running the 5.4 kernel. You may also need nvidia-utils.
If you are running older hardware, you may need to read the information in the update thread: [Stable Update] 2021-01-19 - Kernels, XFCE, Plasma, PulseAudio, Pipewire, Mesa, Firefox, Thunderbird, KDE Apps - #2 by philm