An entire log file is a very useful way of debugging any issues with plugins. Sometimes a snippet of a log doesn't tell the whole story!
You can upload your log file into this channel, or you can use https://mclo.gs/ to censor all IPs present in your log.
For BungeeCord (not Waterfall) there is a proxy.log.0 file in the root and for everything else it is latest.log in logs folder.
past spear
vast crow
ornate cedar