Hi Patrice,
Sorry for the issues you are having. We can try to help out, but the payment processor is all run by WooCommerce and we do not modify any of that coding.
If our plugin is creating a conflict then yes we would help out. Do you know if this does this only with events at checkout or with regular products as well?
Have you searched WooCommerce’s site or plugin on WordPress.org and see if anyone else has seen this issue?
IF you have purchased the Stripe Processor, can you contact them and see if they have a solution?
Let me know and I can try to help out some more.
Thanks