https://trailhead.salesforce.com/content/learn/projects/use-apex-to-automate-business-processes
I receive this error: You encountered some errors when trying to save this record There's a problem saving this record. You might not have permission to edit it, or it might have been deleted or archived. Contact your administrator for help.
I have done everything right as far as the instructions go, retried several times to no avail, also tried to change Permissions on Order object but I already had access.
You can set a user trace debug log and then check to see if everything works.
Additionally, you can set debug statements in your trigger and then execute a DML statement in developer console to see where things are failing.
Ideally, your tests would fail if there's errors in your trigger.
