@jeffcunning - It looks like the issue is the wrong ID value is being set as the key conversion event for the campaign.
First you have to execute GET web_event_tags to retrieve values:
$ twurl -H ads-api.twitter.com "/2/accounts/18ce54glvsr/web_event_tags?" | jq
One of the values returned is your Page View conversion event created.
{
"name": "Page View",
"view_through_window": 1,
"click_window": 30,
"embed_code": "<script src=\"//platform.twitter.com/oct.js\" type=\"text/javascript\"></script><script type=\"text/javascript\">twttr.conversion.trackPid('nwepq', { tw_sale_amount: 0, tw_order_quantity: 0 });</script><noscript><img height=\"1\" width=\"1\" style=\"display:none;\" alt=\"\" src=\"https://analytics.twitter.com/i/adsct?txn_id=nwepq&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=0\" /><img height=\"1\" width=\"1\" style=\"display:none;\" alt=\"\" src=\"//t.co/i/adsct?txn_id=nwepq&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=0\" /></noscript>",
"id": "o00f8",
"retargeting_enabled": false,
"status": "TRACKING",
"type": "SITE_VISIT",
"website_tag_id": "nwepq",
"deleted": false
},
You need to use the ID o00f8 in order to set it as the key conversion event in the campaign.
Thanks!