Loading tutorial file gives an error

[Jackymancs4]

Describe the bug
Loading the file I found in the repo result in the error I've attached to the issue.

To Reproduce
Steps to reproduce the behavior:
2. Click on 'Load a grph from a file'
3. Select the file https://github.com/MarginallyClever/Donatello/blob/main/tutorials/tut1.graph
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

Desktop (please complete the following information):

• OS: Windows
• Version master

Additional context
The file seems to be valid JSON. I see it containes the absolute path to an image on your system (which is another issue), but changing to a file on mine does not fix the problem.

[i-make-robots]

Dumb quesiton: how did you find the tutorial? I think the entire tutorial needs to be updated.

[Jackymancs4]

Well, I just downloaded the repo and build it to see what it was about. My interest sparked after watching your last youtube video.
In the repo there was the tutorial folder with a file inside of it, and I just tried to open it.

I did not find any reference to a tutorial like the one for Makelangelo (https://mcr.dozuki.com/Guide/4.+How+to+use+Makelangelo+Software+7.32+/39?lang=en)

On another note I notices that the screenshot on this repo is no longer representative. And also the "Use it, Discuss it, Love it." uses mostly broken links. I guess it's just the template.

[i-make-robots]

Good catch. I updated the homepage link and I've started a PR to generate javadoc automatically.

[i-make-robots]

#23