Hello,
I am using Oracle SQL Developer with the params listed below and when I open “Preferences - External Editor”, then I see an empty screen.

In Log, I can find one message:
SEVERE 134 0 oracle.ide.extension.HashStructureHook Unexpected runtime exception while delivering HashStructureHookEvent
I would like to assign an extension type to open (blob) with Word/Adobe Acrobat.
Thank You for any help.
About
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Oracle SQL Developer 23.1.0.097
Version 23.1.0.097
Build 097.1607
IDE Version: 12.2.1.6.42.220506.0654
Product ID: oracle.sqldeveloper
Product Version: 23.1.0.097.1607
Version
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Component Version
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Oracle IDE 23.1.0.097.1607
Java(TM) Platform 11.0.18.0.2
Versioning Support 23.1.0.097.1607