Update (4.33) :
- Fixed tftrue_restorestats crash on Linux
- Fixed tftrue_bunnyhop crash on Windows

Update (4.32):
- Fixed tftrue_logs_includebuffs not working under Windows
- Changed tftrue_logs_includebuffs to only log once per second to prevent spamming logs
- Fixed tftrue_bunnyhop crashing on Windows

Will fix with the next update. On windows, the heal buff thing seem to be broken as well, it will not cause crashes though.

Update (3.16) :
- Fixed a viewangles false positive on some “fun” maps

Update (4.31) :
- Fixed tftrue_scope_hsdelay crash on linux
- Added tftrue_logs_includebuffs to includes buffs within the player_healed event in the logs (100% accurate)

Does anyone use tftrue_scope_hsdelay ? It doesn't seem of much use, I might remove it if none uses it.

I think those kind of issues are client side, this isn't something you can fix with a plugin.

Update (4.3):
- Changed tftrue_tournament_config default to 0 to prevent unwanted download of config files on server start
- etf2l_custom.cfg will no longer be overwritten if it already exists
- Prevent endless mapchange loop due to sv_pure being set to a different value in server.cfg
- Added tftrue_restorestats to keep the player stats on disconnect (Score, Kills, Deaths, etc...) and restore them when he reconnects in both scoreboard and A2S_PLAYER queries (e.g. View Game Info in the Server Browser)

Unfortunately I can't download anything from GitHub with the plugin, as it is only HTTPS. I can't download from HTTPS sites without increasing the binary size a lot, which I'd rather avoid.

It would be, but these leagues need to provide a direct link to each .cfg file, not only a .zip. I might consider auto switching, but I'm working on some other stuff for now.

Will be fixed in the next update.

The update has been released.

Changelog for the upcoming update which should be released later today:

Update (4.2) :
- Replaced tftrue_tournament_insecure and tftrue_tournament_mapconditions by tftrue_tournament_config
- Added a warning when tournament mode starts if sv_cheats is enabled
- Added a warning when tournament mode starts if the download of any config files failed
- mp_tournament_whitelist will now always be reset to TFTrue whitelist, TFTrue will generate a whitelist based on the whitelist that was set through it + TFTrue settings
- tftrue_whitelist now supports ETF2L 9on9
- sm_map will now work with tftrue_tv_delaymapchange
- Fixed log upload failing when the server would write to the log during the upload
- Fixed tftrue_bunnyhop not working anymore

Update (3.15) :
- Fixed some rare viewangles detections being marked as false positives while they weren't, which resulted in some cheaters not being banned

Update (3.14):
- Fixed players being banned multiple times after an invalid viewangles detection
- Stopped logging again the autotrigger detections on map change for a specific player if his detection count hasn't changed since the previous map

Done :)

It works fine here. Could you try again?
If not, I guess it's a problem from your ISP network. You could try with a proxy or VPN.