Thank you for your fast answer.
I tried log out/ log in, reinstallation of AccuRig and to keep opened
https://www.reallusion.com/ while I was logged during the export, but nothing works.
I'm wondering if the problem is not that connection between my realillusion account and the AccuRig software, because my name appear on the upper right corner of the website, but in AccuRig it's just written "user"...
I added 2 screenshots to show you what I mean.