The detailed error is in that info.log file from the message.
That is a valid path, just paste it in file explorer's address.

Also can you post your world, I suspect it might be needed for me to replicate the issue.

Sure thing. I'll post a link once I get it published.

Ok, here's the link to the world on my workshop.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1382725356

The weird thing is that when I place the block, nothing happens. But then when I delete either part of the block the error message pops up. That was something I failed to mention.

The problem is much deeper, the Emissive Controls mod does some hacky stuff which causes issues with other mods, some issues are silent, some crash, in this case it throws unexpected errors because it updates the code when the block no longer exists (and continues to update even after you exit the world and load another, unless you restart the game).

I've notified the mod author with the issue and I hope they'll make their mod play nice :}
https://steamhost.cn/steamcommunity_com/workshop/filedetails/discussion/1359585046/2828702372994569901/

While I can update my mod to specifically check for the conditions that mod causes, I spent enough time on this and you'd probably still have issues in some other ways, I recommend just removing that Emissive Controls mod for now.

Very interesting. Thanks very much for letting me know about it.