If an Trip Organizer see an internal server error during trip preview or publishing, or the message “You need to create at least one package before publishing this trip,” or any issue while trying to publish the trip, they need follow these steps:
Check payment options for each package
Open the trip, click Edit Trip and go to Payments.
Under Payment Plans, click Edit Payment Plans and pick a package when asked “Which package do you want to edit?”
Choose Pay in Full only or Pay in Full + Installments, set the deposit and dates if needed, and use Apply to Packages to cover the others.
Click Save Changes.
Try publishing the trip again.
If the issue continues, verify the following:
Trip and package dates are valid, within the same range, and set in the future.
If a package is priced on room types, confirm at least one room option has a rate for it (Room Types → room option → Add Rate).
After completing these checks, try publishing the trip once more.