This error is in the settings-catalogs section:
wp-admin/admin.php?page=llms-settings&tab=catalogs
SETTINGS
Version: 3.1.6
Course Catalog: Course Catalog (#12990)
Course Catalog Per Page: 10
Course Catalog Sorting: menu_order,ASC
Membership Catalog: Membership Catalog (#12993)
Membership Catalog Per Page: 10
Membership Catalog Sorting: menu_order,ASC
Site Membership: Not Set
Student Dashboard: My Courses (#11756)
Courses Endpoint: my-courses
Edit Endpoint: edit-account
Lost Password Endpoint: lost-password
Vouchers Endpoint: redeem-voucher
Autogenerate Username: yes
Password Strength Meter: yes
Minimum Password Strength: strong
Terms Required: no
Terms Page: Not Set
Checkout Names: required
Checkout Address: required
Checkout Phone: hidden
Checkout Email Confirmation: no
Open Registration: yes
Registration Names: required
Registration Address: required
Registration Phone: hidden
Registration Voucher: optional
Registration Email Confirmation: no
Account Names: required
Account Address: required
Account Phone: hidden
Account Email Confirmation: no
Checkout Page: Purchase (#12589)
Confirmation Endpoint: confirm-payment
Force Ssl Checkout: no
Country: US
Currency: USD
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Decimals: 2
Trim Zero Decimals: no
Recurring Payments: no
Email From Address: [email protected]
Email From Name: Volume 4 Volume
Email Footer Text:
Email Header Image:
Cert Bg Width: 800
Cert Bg Height: 616
Cert Legacy Compat: no
GATEWAYS
Manual: Enabled
Manual Logging: yes
Manual Order: 1