Describe the bug
When generating the html version of the documentation, the two figures used inside the file OSE_ORGANIZATION.md (this file is in the root of the MOLE repository) are missing. The two
figures are included as:

• "line 30: '['MOLE OSE Pillar']'(doc/assets/img/MOLE_pillars.png)"
• "line 69: '['MOLE OSE Governance Model']'(doc/assets/img/MOLE_OSE_circles.png)"

NOTE: In the above lines, single quotes were added around the brackets to avoid displaying the missing hyperlink

When creating the documentation on my local computer (running OS/X), the images
show without a problem. However, these show as missing in the html documentation.

To Reproduce
Steps to reproduce the behavior:

1. Go to the generated documentation html page for the OSE Organization
2. Scroll down to MOLE OSE Organization Pillars, where the first missing figure is found,
3. Also scroll down to MOLE OSE Governance Model, where the second missing figure is found,

Expected behavior
When manually creating the html pages on my local system, both figures are correctly displayed as shown in these two screenshots (corresponding to figure 1 and figure 2, respectively)

Screenshots
These screenshots illustrate the issues in MOLE repository.

Additional context
I am not sure if this issue only shows in selected environments.