Hello @Lionel,
Thank you for purchasing our theme and for reaching out to our support center.
It appears that this issue is related to the XStore AMP plugin. Are you planning to use the AMP version? If not, we recommend that you keep the XStore AMP plugin disabled.
To do this, please go to Dashboard > Plugin > XSotre AMP > Deactivate and then clear your browser cache.
Best Regards,
8Theme’s Team