sync problem between PP Beta and creative cloud

PP Beta 22.3.0.9.

In PP Beta export tab, I select "creative cloud" and I see that my video size  is 212 Mo (MP4). So I click on "export" and at the bottom right I have the same error alert (twice the same message) :

It says "impossible de synchroniser avec le creative cloud", ie "unable to sync with creative cloud".

I have this problem only when the video file size is big.

If I go on creative cloud, it seems to work (I have my MP4 file coming from PP Beta, and I can play it).