Sorry for the late answer.
To say the truth, we do not understand whether you have a problem or not. Could you please specify this moment?
If there is a problem with our add-on, please, contact us and our developer will fix it as soon as possible.
Best regards, Alt-team.
The problem was that we can not uploaded the variant images. After searching it was the agressive popup that causes this issue.
Disabling that addon was fixing the problem with the variant images.
The problem was an update from the agressive popup.
Like a mention in edited post with Update
Regards