nothing happens during draw save #2321

Describe the bug
nothing happens during draw save

since the last update i can't create a drawing anymore, if you want to insert a drawing the editor appears and after pressing the save button nothing happens.

So the drawing is neither saved nor inserted in the bookstack

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Steps To Reproduce
Steps to reproduce the behavior:
is already written above

Expected behavior

the drawing should fit into the page

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): 0.30.2
• PHP Version:
• Hosting Method (Nginx/Apache/Docker): docker

Additional context
Add any other context about the problem here.