Error Handling 

TypoGraph logs helpful warnings and errors when relations are misconfigured:

• Missing configuration: "Relation Taxonomy.disciplines is not configured in the site configuration"
• Missing targetType: "Relation Taxonomy.disciplines is missing targetType configuration"
• Unmapped target: "Target type Discipline is not mapped to a table in tableMapping"
• Missing MM table: "Relation Expert.disciplines with storageType=mmTable is missing mmTable configuration"
• Missing foreign key field: "Relation Taxonomy.disciplines with storageType=foreignKey is missing foreignKeyField configuration"

Check your TYPO3 logs if relations return null or empty arrays unexpectedly.