I'm using prism MC on my deck and PC, It loads fast when launching with an internet connection, however it seems to hang when I try to launch offline (which is only possible with an paid copy of Minecraft).
the log hangs on [main/INFO]: I used the json to destroy the json
then continues on [main/WARN]: Failed to load online filter, using local version

This does not happen with other modpacks so it has to be this modpack, if this is something you cant fix for everyone is there something I can remove that's waiting for a response over the internet?

log.txt
This is the log if you need it
There was a 20 min wait between the two quotes above

Ok, this is good to know. We include the pipeblocker mod to prevent a certain type of vulnerability in mods being exploited. This shouldn't be necessary anymore as of the last update of the modpack, because the one known vulnerable mod was updated to fix the issue, but we left it in because it so far didn't hurt anything. You can remove the mod and it should fix this specific issue. Please update/close this issue if it does.

Thanks a lot, removing pipeblocker allowed it to start immediately!