When i opened a lab it crashed and gave the following log:
Error while running event actual-craft-time::on_gui_opened (ID 95) LuaEntityPrototype doesn't contain key researching_speed.
state traceback:
[C]: in function 'index'
__actual-craft-time/control.lua:351: in function 'getRecipeFromLab'
actual-craft-time/control.lua:406: in function 'getRecipe'
actual-craft-time/control.lua:721: in function
<actual-craft-time/control.lua:700>
If at all important, i had 2 lab research speed upgrades at the time, and was researching with automation, logistic, and military, specifically researching the flamethrower tech
Hope this helps!