Issue with copy images to output directory

[jaapio]

Coping images linked in rst files are giving an error:

[error] Unable to write file "/guides/docs/cli/first-docs.png", Impossible to create the root directory "/opt/project/build/docs/guides/docs/cli". mkdir(): File exist

Expected behavior

Image should be linked correctly

Actual behavior

Error is reported image is not copied. The output html looks fine.

Steps to reproduce the problem

1. add an image directive to an rst file and link it to an existing image
2. run phpdoc