Aliexpress Dropshippinf and Fufillment for WooCommerce fulfillment doesn’t work

everything is working fine.
But there is one thing, the last step. It worked, but now not anymore: Fulfill the order from aliexpress to woocommerce.
First of all, the Fullfill Tab wasnt ever avalaible. But It worked with, when I clicked on the ”Orders” in the right corner, then ”begin fulfillment”. Now when I click on it, it doesnt forward me to the aliexpress side. its load briefly, but pops up again on the same page.
please help me