Maybe related:
Desktop client on Windows won’ start libcrypto.dll missing
Also:
[Bug]: System Error - libcrypto-1_1-x64.dll not found after update to 3.9.1 (Windows 11) #5924
The proposed solution is “to simply uninstall Nextcloud and then reinstall it via the [latest] installer. Works without problems. Please download the installer from the website.”
I suppose the updater is doing something wrong. I cannot test this, since i don’t have Windows nor do i use the desktop client anyway.
I hope you get it working.