It has a simple implementation using realm. (ion app)
When you try to view the contents of the data with realmbrowser, the key is requested as follows.

It seems that you can set the key in realmbrowser, but why is the key requested even though I have not set the key myself?

What should I do to be able to see the contents of the data?

Please enter a valid encryption key for this Realm file.
The encryption key must be entered as a 128 character string if hexadecimal values.
What I tried

Check the contents by dropping the version of Realmbowser.
(However, migration is necessary and an error occurs.)

Supplemental information (FW/tool ​​version, etc.)

Realmbrowser Version 3.0.1
xcode Version 11.5(11E608c)