Ola !
I received this error previous week but had no motivation for reporting, like the mod is great and those are minor inconvenience which may take lot of time to fix while there are quick workaround. :
Error while running event Cursed-Exp::on_gui_click (ID 1)
Given entity doesn't exist anymore.
stack traceback:
Cursed-Exp/scripts/gui.lua:1438: in function 'clickgui'
Cursed-Exp/control.lua:205: in function <Cursed-Exp/control.lua:204>
screenshot : https://ibb.co/7b8Bc0J
To replicate : 1=> place fisher 2=> use landfill under the fisher 3=> use GUI to "show" which fisher you destroy with landfill.
You need to use robots if like me you missplace landfill and killed one fisher , they keep their lvl when you move them though, which is nice :D.
PS: lvl 100 is the max right ? they don't eat flesh anymore after that
[EDIT] other (unrelated) question : do generator produce pollution ?
and if someones wander here there some informations , each lvl it's a +0.09 blood / sec , with 4760 talents tiers 3 you can have up to 64 fishers.
all numbers below are approximation to illustrate point
Don't be fooled, if you only spend 1 talent tier 3 nothing will happen , you need something like 5 to get your first additionnal fisher. It may makes you salty if you have hard time getting 1 realising you need more , you would/could have tried later.
The more you have , the better each individual perform , since the more you have , the more talent you have spent , thus the faster they gain experience.
It scale to the point that for 15 K flesh , you can't get 1 from lvl 30 to 40 , if you only have 1 , but it will get you another one from lvl 1 to 100 if you have already 50 of them , making it easy to have them all the same lvl , in case that is important for you ;)
again very good mod , i have played more than 2000 hours of factorio , and the modding community really creates multiple experiences from the same good solid and evolutive base , good thing sir :)