My submission of a case has been rejected and this message page appeared, even though I surely filled out all required fields and also the attached file size was very small. Could you please check if the system works fine?
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Hi @NatalieAtSafe and @BrianAtSafe, thanks for your responses.
I retried submitting the same case and was successful today. The reason is unknown but it seems to have been resolved.
There is a Japanese character in the description (red underline), and I thought that it could cause the issue, but uncertain. If the issue recurs, I'll report again.