Illegal value for config doc

when I selected an answer from existing questions as follows:
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There will report a bug"Illegal value for config doc." the pop-up windows as follows
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But if I reopen the page and type the answer by myself the pop-up windows don’t appear.
This bug troubled me in the past two days but I find it is fixed today

Hi @Wenwen_Xu,

Thank you for letting us know about the issue. We did an update on Wednesday night PDT. It is likely the issue is fixed in the newest version. Please feel free to let us know if you see the issue again or if there are other issues.

Hi @wchen

the bug reappears. When I select the answer for “Which subjects do you cover” the pop-up windows will report me a warning “Illegal value for config doc.” as follows:

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Could you help me to fix it? Thank you

Hi @Wenwen_Xu,

Thank you for reporting the issue. Can you send us the entire error message? It would be very helpful for us to investigate the issue.

Thanks for your reply. The pop-up windows don’t allow the message to be copied, so I take a screenshot of the error message as follows and I hope it is useful.
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Hi @Wenwen_Xu,

We just pushed an update. Can you check if the issue is solved?

Hi @wchen thanks for your work, The issue was solved :+1: