LuaForce::current_research is read only.

https://ibb.co/cF0pV6z

I just got the same error message.

StackTrace of error:
The mod Auto Research caused a non-recoverable error.
Please report this error to the mod author.

Error while running event auto-research::on_research_finished (ID 18)
LuaForce::current_research is read only.
stack traceback:
auto-research/control.lua:221: in function 'startNextResearch'
auto-research/control.lua:253: in function <auto-research/control.lua:224>
stack traceback:
[C]: in function 'newindex'
__auto-research/control.lua:221: in function 'startNextResearch'
auto-research/control.lua:253: in function <auto-research/control.lua:224>

Same same!
The mod Auto Research caused a non-recoverable error.
Please report this error to the mod author.

Error while running event auto-research::on_research_finished (ID 18)
LuaForce::current_research is read only.
stack traceback:
auto-research/control.lua:221: in function 'startNextResearch'
auto-research/control.lua:253: in function <auto-research/control.lua:224>
stack traceback:
[C]: in function 'newindex'
__auto-research/control.lua:221: in function 'startNextResearch'
auto-research/control.lua:253: in function <auto-research/control.lua:224>

Temporary workaround, edit control.lua and replace:

force.current_research = next_research

by this line:

if (next_research) then force.add_research (next_research) end

probably doesn't work well when the research queue is enabled, though, but works for me.

Cheers for the reports. I'll see if I can fix this when I'm home from work.

Never mind, didn't see that Mod Author is on it.

It should be fixed now.
Ended up with the fix schmorp suggested, as the research queue is disabled when AR is enabled.

Thanks for the Update!

https://drive.google.com/open?id=1v3Org4Xo0B8wwnBSnSN9OkKO7GTzr6RZ

is this fixed?

Update your game and mods, that error was fixed on latest update.

fscussel: Looks like you don't have the latest version of Factorio. Either upgrade Factorio to the latest version or downgrade Auto Research to 5.0.1.