Fatal error: Call to a member function set_display() on a non-object in /home/admin/public_html/sites/all/modules/commerce/commerce.module on line 357

Were you running the coupon 1.x version and then installed the 2.x code? There is not currently an upgrade path from 1.x to 2.x.

Marking as resolved, reopen if necessary

I reopened because I am having the same issue.

I'm using the latest 7.x-2.x-dev code as of today.

Thanks in advance for any help.

I am having this issue as well. I had 1x installed previously, but I uninstalled it before installing 2x. I'm using 7x-2.0-beta2 with the fixed_strict_warning.patch.

I'm the same as @amysragbag previously tried Commerce_Coupon 1 on a development site, but uninstalled prior to using 2. Did anyone get anywhere with this?

*edit* my problem was due to the coupons pane appearing to load twice on the checkout review screen. To resolve I removed the checkbox saying "Include this pane on the Review checkout pane." and reset the view used for coupons to being "None". If people feel this is a separate bug (I wasn't able to reproduce on a clean install) I will do so.

#6 works for me.

#6 Works for me too!

On Drupal Commerce with Commerce Coupon 2 beta 4 the path to go to is admin/commerce/config/checkout/form/pane/commerce_coupon.

Thank you for the timesaving tip David!