Unable to create a folder in the root directory of the application (the equivalent of src), such as a folder called config in the equivalent of src. Starting the application at this time will cause an exception [ java.lang.IllegalStateException: No subdirectories found for mandatory directory location 'file:./config/*/' ], even if the entire SpringBoot application has not written a single line of code.
Comment From: mschneid
Duplicate of #26627 (2.4.x) and #26672 (2.5.x).