2checkout nop 3.50 not change status to paid

currently use nopcommece 3.50 I have a problem since I applied tls 1.2 with 2checkout, I commented that I already made the settings that indicate to activate tls 1.2 and it works well with paypal and other payments, but with 2checkout at the time of making the purchase the client everything comes back but the status of the order is pending and does not change to paid

If someone knows how to fix that, help

Same issue here on nop 3.6.

Help updating the version of 2checkout for nopcommerce 3.50 from June 28, 2018 we have problems with the plugin at the time of generating an order the order does not change the status to paid and from that date the orders generated have only pending status.

I have already made the updates to tls 1.2 but the problem continues

waiting for your help greetings