A Label in information protection not work correct

Occasional Visitor

Dear All,

 I have a problem with my label. I defined a label call with name is "Personal" an config it is "Let user assign permission", last month i using it normal, but now when i label a document with "Personal", it open a different windows ( i have attach screenshot in thist discussion). Can anyone help me to slove it!

More information:

 1. I using EMS E5 license

 2. My office is 2019 and Office 365 Apps for Business

Thank very much!Untitled.png

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