Why can't I open any Parent class or source file in a text editor?

When I click on the parent class, which says “click to open this source file in text editor” nothing happens. visual studio does not open with the c++ script.

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Almost 10 years later, still no response hahaha. Dealing with the same thing at the moment.

Figured it out. Turns out I did not have the Source Code Editor set in the Editor Preferences. (Unreal 5.2.1 as of writing this) In Editor Preferences, in General, Source Code, and check if the Source Code Editor is set. I did not have anything set, which is why clicking on the source file in Blueprint wouldn’t open Visual Studio.