Hello all,
We are working on Confluence Server 7.13.4 with a Gliffy plugin version 9.5.0 and a valid licence.
Some users reports to us an issue, when they want to edit a Gliffy on their pages, they have the following error:

What they do:
- Click on Edit on the page they want to Edit
- Then click on the Gliffy and select Edit on the macro menu
The macro is not in a special layout (tab, other macro,...)
We have found a workaround by copying an older version of the gliffy by going through the "Attachments" and re-upload en older version.
After doing some search on the forum and Gliffy support page, I did not found a solution or an explanation on this.
We try to compare the code of both diagrams - broken gliffy VS workaround - but nothing unusual . . .
Do you already found yourself in this case?