Answered
When I try to upload the attached file, I obtain the following error:
This is no valid material: O:8:"stdClass":1:{s:5:"isNew";b:1;}
Is there any way to fix it?
Files:
sen6.1-neo.ggb
The same question 
When I try to upload the attached file, I obtain the following error:
This is no valid material: O:8:"stdClass":1:{s:5:"isNew";b:1;}
Is there any way to fix it?
je ne rencontre pas un tel problème
essaye de nouveau, peut-être un problème sur le cloud GGb ?
https://www.geogebra.org/m/gkdmpb7z
Small bug - login in your browser first as a workaround for now
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