Форум

[QUOTE]wrote:
Focus on structure [URL=https://dev.1c-bitrix.ru/rest_help/catalog/price/catalog_price_modify.php]https://dev.1c-bitrix.ru/rest_help/catalog/price/catalog_price_modify.php[/URL] / [URL=https://www.dnahrblock.net/]DNAHRBlock.com[/URL]
And field requirements. [URL=https://dev.1c-bitrix.ru/rest_help/catalog/price/catalog_price_getfields.php]https://dev.1c-bitrix.ru/rest_help/catalog/price/catalog_price_getfields.php[/URL]

Judging by the error,
the request does not see a whole block of required fields:

{
                catalogGroupId: 1,
                currency: RUB,
                price: 2001 ,    
                quantityFrom: 1,
                quantityTo: 2
              },

rather incorrect nesting (did not follow the request structure)
[/QUOTE]
Thanks a lot for the reply. I will try the suggested solution from your link.