this is the nav in my mkdocs.yml file. Up to the User-Guides folder it all built perfectly. Then on adding the User Guides Tab and its md files to the list, got the error.
nav:
- index.md
- Getting Started:
- 'Onboarding MH': 'EMD/getting-started/onboarding-ccm.md'
- Operational Guides:
- EMD/Operational-Guides/index.md
- Setup and Installation:
- 'Setting Up EMD On Edge': 'EMD/Operational-Guides/Setup-and-Installation/Setting-Up-EMD-On-Edge/setting-up-emd-on-edge.md'
- Upgrading:
- 'EMD 2.0 Upgrade': 'EMD/Operational-Guides/Upgrading/EMD-2.0-Upgrade.md'
- Feature Flags:
- 'Launch Darkly Flags': 'EMD/Operational-Guides/Feature-Flags/Launch-Darkly-Flags.md'
- User Guides:
- EMD/User-Guides/index.md
- MH-Dictionary:
- 'About': 'EMD/User-Guides/MH-Dictionary/About.md'
- Organization:
- 'Organization': 'EMD/User-Guides/MH-Dictionary/Organization/Organization.md'
- Business-Day:
- 'Business-day-scheduler': 'EMD/User-Guides/MH-Dictionary/Organization/Business-Day/Business-day-scheduler.md'
- Chain:
- 'Stores': 'EMD/User-Guides/MH-Dictionary/Organization/Chain/Stores.md'
- 'Touchpoints': 'EMD/User-Guides/MH-Dictionary/Organization/Chain/Touchpoints.md'
- Culture:
- 'Messages': 'EMD/User-Guides/MH-Dictionary/Organization/Culture/Messages.md'
- General:
- 'Reason Codes': 'EMD/User-Guides/MH-Dictionary/Organization/General/Reason Codes.md'
- Touchpoint Categories:
- 'Touchpoint Applications': 'EMD/User-Guides/MH-Dictionary/Organization/Touchpoint Categories/Touchpoint Applications.md'
- 'Touchpoint Groups': 'EMD/User-Guides/MH-Dictionary/Organization/Touchpoint Categories/Touchpoint Groups.md'
- Touchpoint Devices:
- 'Device Types': 'EMD/User-Guides/MH-Dictionary/Organization/Touchpoint Devices/Device Types.md'
- 'Devices': 'EMD/User-Guides/MH-Dictionary/Organization/Touchpoint Devices/Devices.md'
- Sales:
- 'Sales': 'EMD/User-Guides/MH-Dictionary/Sales/Sales.md'
- Barcodes:
- 'Data Patterns': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Data Patterns.md'
- 'General Tab': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/General Tab.md'
- Content Tab:
- 'Blind Pickup Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Blind Pickup Data Pattern Type.md'
- 'Cashier Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Cashier Data Pattern Type.md'
- 'Content Tab': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab.md'
- 'Coupon Pickup Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Coupon Data Pattern Type.md'
- 'Cradle Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Cradle Data Pattern Type.md'
- 'Customer ALT and PIN Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Customer ALT and PIN Data Pattern Type.md'
- 'Customer Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Customer Data Pattern Type.md'
- 'Databar Item Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Databar Item Data Pattern Type.md'
- 'Drivers License Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Drivers License Data Pattern Type.md'
- 'End Of Trip Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/End Of Trip Data Pattern Type.md'
- 'Gift Receipt Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Gift Receipt Data Pattern Type.md'
- 'Group Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Group Data Pattern Type.md'
- 'IMEI Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/IMEI Data Pattern Type.md'
- 'Item Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Item Data Pattern Type.md'
- 'Online Services Profile Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Online Services Profile Data Pattern Type.md'
- 'Order Service Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Order Service Data Pattern Type.md'
- 'Release Device Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Release Device Data Pattern Type.md'
- 'Tax Exemption Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Tax Exemption Data Pattern Type.md'
- 'Tender Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Tender Data Pattern Type.md'
- 'Transaction Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Transaction Data Pattern Type.md'
- 'Warm Reboot Data Pattern Type': 'EMD/User-Guides/MH-Dictionary/Sales/Barcodes/Content Tab/Warm Reboot Data Pattern Type.md'
- Items:
- 'Online Purchase Profiles': 'EMD/User-Guides/MH-Dictionary/Sales/Items/Online Purchase Profiles.md'
- 'PLU Groups': 'EMD/User-Guides/MH-Dictionary/Sales/Items/PLU Groups.md'
- 'PLU Menus': 'EMD/User-Guides/MH-Dictionary/Sales/Items/PLU Menus.md'
- Return Policies:
- 'Details Tab': 'EMD/User-Guides/MH-Dictionary/Sales/Return Policies/Details Tab.md'
- 'Restrictions Tab': 'EMD/User-Guides/MH-Dictionary/Sales/Return Policies/Restrictions Tab.md'
- 'Return Policies': 'EMD/User-Guides/MH-Dictionary/Sales/Return Policies/Return Policies.md'
- Rules:
- 'Action Types': 'EMD/User-Guides/MH-Dictionary/Sales/Rules/Action Types.md'
- 'Actions Tab': 'EMD/User-Guides/MH-Dictionary/Sales/Rules/Actions Tab.md'
- 'Age Restrictions': 'EMD/User-Guides/MH-Dictionary/Sales/Rules/Age Restrictions.md'
- 'Business Rule Types': 'EMD/User-Guides/MH-Dictionary/Sales/Rules/Business Rules Types.md'
- 'Conditions Tab': 'EMD/User-Guides/MH-Dictionary/Sales/Rules/Conditions Tab.md'
- Tax:
- 'Tax Authorities': 'EMD/User-Guides/MH-Dictionary/Sales/Tax/Tax Authorities.md'
- 'Tax Brackets': 'EMD/User-Guides/MH-Dictionary/Sales/Tax/Tax Brackets.md'
- 'Tax Exemption Parameters': 'EMD/User-Guides/MH-Dictionary/Sales/Tax/Tax Exemption Parameters.md'
- 'Tax Rates': 'EMD/User-Guides/MH-Dictionary/Sales/Tax/Tax Rates.md'
- 'Tax Zones': 'EMD/User-Guides/MH-Dictionary/Sales/Tax/Tax Zones.md'
- 'Tax': 'EMD/User-Guides/MH-Dictionary/Sales/Tax/Tax.md'
- Tendering:
- 'Currency Exchange Rates': 'EMD/User-Guides/MH-Dictionary/Sales/Tendering/Currency Exchange Rates.md'
- 'Currency': 'EMD/User-Guides/MH-Dictionary/Sales/Tendering/Currency.md'
- 'Donations': 'EMD/User-Guides/MH-Dictionary/Sales/Tendering/Donations.md'
- 'Shopper ID Verification': 'EMD/User-Guides/MH-Dictionary/Sales/Tendering/Shopper ID Verification.md'
- 'Tender Exchange': 'EMD/User-Guides/MH-Dictionary/Sales/Tendering/Tender Exchange.md'
- 'Tender Fee Policy': 'EMD/User-Guides/MH-Dictionary/Sales/Tendering/Tender Fee Policy.md'
- 'Tender': 'EMD/User-Guides/MH-Dictionary/Sales/Tendering/Tender.md'
- Touchpoint Behavior:
- 'Branding': 'EMD/User-Guides/MH-Dictionary/Sales/Touchpoint Behavior/Branding.md'
- 'Command Menu': 'EMD/User-Guides/MH-Dictionary/Sales/Touchpoint Behavior/Command Menu.md'
- 'Tender Menu': 'EMD/User-Guides/MH-Dictionary/Sales/Touchpoint Behavior/Tender Menu.md'
- 'Touchpoint Parameters': 'EMD/User-Guides/MH-Dictionary/Sales/Touchpoint Behavior/Touchpoint Parameters.md'
- US WIC Tendering:
- 'WIC CVB Product Mapping': 'EMD/User-Guides/MH-Dictionary/Sales/US WIC Tendering/WIC CVB Product Mapping.md'
- 'WIC EBT Agencies': 'EMD/User-Guides/MH-Dictionary/Sales/US WIC Tendering/WIC EBT Agencies.md'
- 'WIC EBT Policy': 'EMD/User-Guides/MH-Dictionary/Sales/US WIC Tendering/WIC EBT Policy.md'
- 'WIC Product Exclusions': 'EMD/User-Guides/MH-Dictionary/Sales/US WIC Tendering/WIC Product Exclusions.md'
- Appendix:
- 'Browse or Lookup Item Selection': 'EMD/User-Guides/MH-Dictionary/Appendix/Browse or Look Up Item Selection.md'
- 'Group Search': 'EMD/User-Guides/MH-Dictionary/Appendix/Group Search.md'
- 'Location Search': 'EMD/User-Guides/MH-Dictionary/Appendix/Location Search.md'
- 'Product Search': 'EMD/User-Guides/MH-Dictionary/Appendix/Product Search.md'
- 'Search Function From All Screens': 'EMD/User-Guides/MH-Dictionary/Appendix/Search Function From All Screens.md'
- Create New Messages:
- 'Create New Messages': 'EMD/User-Guides/MH-Dictionary/Appendix/Create New Messages/Create New Messages.md'
- MH-Configuration:
I tried additional indents, I double checked spacing, double-checked quotations.