redsautorehab.com
php 8.0

I upgraded to 1.5.8 last week, and after fixing the last error I had, I now have a new one from shipstation. I uploaded the newest version of shipstation_zc.php, 1.8, and it is using the older style of filenames. It is setting this error:
[27-Dec-2022 12:01:59 America/Boise] Request URI: /shipstation_zc.php?SS-UserName=********&SS-Password=*******&action=export&start_date=12%2f27%2f2022+03%3a48&end_date=12%2f2 8%2f2022+11%3a01&page=1, IP address: 34.200.1.155
--> PHP Warning: Undefined array key "orders_id" in /home1/redsauto/public_html/shipstation_zc.php on line 119.

What is the new style of array key to use with 1.5.8?