Hi, Thanks for your nice work!
Following the annotation on the README. First, I tagged an entity "机器", pressed shortcut key 'q'. The entity was deleted. Then, I pressed "ctrl + z", the full text of the imported file disappear and I got an error as follows, and have no idea to deal with it.


Could you please tell me what part of the process went wrong? and how to fix it?
I am very pleased to hear from you on the question's comments.
Hi, Thanks for your nice work!


Following the annotation on the README. First, I tagged an entity "机器", pressed shortcut key 'q'. The entity was deleted. Then, I pressed "ctrl + z", the full text of the imported file disappear and I got an error as follows, and have no idea to deal with it.
Could you please tell me what part of the process went wrong? and how to fix it?
I am very pleased to hear from you on the question's comments.