Just installed the newest test version (v4.34.7) and I still get the
HTTP Error in FFF '403 Client Error: Forbidden for url: https://forums.sufficientvelocity.com/login'(403) when trying to update the fiction I mentioned in the previous message using "Update EPUB if New Chapters" without any changes to the INI file or any other settings.
I then tried to use flaresolverr (v3.3.18, the latest version at the time I'm writing this) along with
use_flaresolverr_proxy:directimages in the SV section of my INI file and while it did detect the challenge, it failed to solve it.
Relevant section of the flaresolverr log:
EDIT:
I'm now getting the same
HTTP Error in FFF '403 Client Error: Forbidden for url: https://forums.sufficientvelocity.com/login'(403) on all of my SV threads I've downloaded via FFF.
EDIT 2 (2024-05-24 1651 UTC):
I just tried updating my SV fictions again and I'm not sure what changed, but I'm no longer getting any 403 errors and the fiction in the Unlisted Fiction section of SV also updates now. So I'm guessing it's fixed now, thanks JimmXinu!