9 files declare their use of InvalidStreamWrapperException in Drupal 10

CopyTest.php in core/modules/file/tests/src/Kernel/CopyTest.php

file.module in core/modules/file/file.module

Defines a "managed_file" Form API field and a "file" field for Field module.

FileRepository.php in core/modules/file/src/FileRepository.php

FileRepositoryTest.php in core/modules/file/tests/src/Kernel/FileRepositoryTest.php

FileUploadHandler.php in core/modules/file/src/Upload/FileUploadHandler.php

FileUrlGenerator.php in core/lib/Drupal/Core/File/FileUrlGenerator.php

FileUrlGeneratorTest.php in core/tests/Drupal/KernelTests/Core/File/FileUrlGeneratorTest.php

MoveTest.php in core/modules/file/tests/src/Kernel/MoveTest.php

system.module in core/modules/system/system.module

Configuration system that lets administrators modify the workings of the site.