Sorry, I messed up. Already fixed. Cannot connect to LAN with productive bees installed. Error message reads as "Serialization error around byte # <--" this changes. Console spits out productive bees errors of various types. Went through 142 mods to discover removing productive bees resolved LAN connection issue. Will comment with a gist server log asap.

Which version of MC and the mod are you using?

Was using 2.7, just updated to 2.8 and this is fixed. (1.16.4, 142 mods.)

Thank you for the prompt reply, sorry it was my error.

excellent :)