Fakturate API problem types

Errors use RFC 9457 application/problem+json. The type field dereferences to one of these pages.

type	status	title
`unauthorized`	401	Unauthorized
`rate-limit-exceeded`	429	Too Many Requests
`unsupported-media-type`	415	Unsupported Media Type
`invalid-idempotency-key`	400	Invalid Idempotency Key
`invalid-body`	400	Invalid Request Body
`payload-too-large`	413	Payload Too Large
`malformed-json`	400	Malformed JSON
`invalid-invoice`	422	Invalid Invoice
`invalid-method`	400	Invalid Method
`invalid-route`	400	Invalid Route
`internal-error`	500	Internal Server Error

Field-level codes

An invalid-invoice problem carries an errors[] array of { path, code, message } objects using these codes.

code	meaning
`required`	A required property was missing or empty.
`invalid_type`	A value had the wrong JSON type.
`invalid_format`	A string did not match the expected format (e.g. email, tax ID, date).
`invalid_date`	A date was not a real calendar date in YYYY-MM-DD form.
`invalid_range`	A date or value fell outside an allowed relationship (e.g. due date before issue date).
`out_of_range`	A number fell outside its allowed minimum/maximum.
`too_long`	A string exceeded its maximum length.
`unknown_property`	The object contained a property that is not part of the contract.
`unsupported_value`	A value was not one of the supported enum values.
`min_items`	An array had too few items.
`max_items`	An array had too many items.
`incompatible_value`	A value is not allowed for the chosen VAT treatment.
`incompatible_property`	A property is not allowed for the chosen VAT treatment.
`required_for_treatment`	A property is required for the chosen VAT treatment.
`required_for_profile`	A property is required for the chosen profile (e.g. XRechnung).
`invalid_country`	A country code was inconsistent with the VAT treatment.
`invalid_vat_id`	A VAT identifier did not match the published structure for its country (EN 16931 subset).
`invalid_iban`	An IBAN failed the ISO 13616 check-digit test.
`non_eu_vat_treatment`	An intra-EU VAT treatment (reverse charge or intra-Community supply) was used with a non-EU party.
`amount_too_large`	A line amount exceeded exact integer-cent arithmetic.
`total_too_large`	The invoice total exceeded exact integer-cent arithmetic.
`semantic_validation`	The invoice violated a profile or VAT-treatment requirement during generation.

See the full API documentation.