Error on PDP

invalid json response body at https://rituals-react-projec-staging.mobify-storefront.com/mobify/proxy/ocapi/s/IBE/dw/shop/v23_2/custom_objects/CustomApi/contentful-data?currency=EUR&locale=es-ES&params=%7B%22fields.channel_contract_field%22:%221708617516612_b558c23e-118c-35eb-e947-b180c197090e%22,%22content_type%22:%22page%22,%22locale%22:%22es-ES%22,%22tags%22:%22spaceweb%22,%22skipMappingOfPreviewData%22:true,%22include%22:8%7D reason: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

Stack trace:

FetchError: invalid json response body at https://rituals-react-projec-staging.mobify-storefront.com/mobify/proxy/ocapi/s/IBE/dw/shop/v23_2/custom_objects/CustomApi/contentful-data?currency=EUR&locale=es-ES&params=%7B%22fields.channel_contract_field%22:%221708617516612_b558c23e-118c-35eb-e947-b180c197090e%22,%22content_type%22:%22page%22,%22locale%22:%22es-ES%22,%22tags%22:%22spaceweb%22,%22skipMappingOfPreviewData%22:true,%22include%22:8%7D reason: Unexpected token '<', "<!DOCTYPE "... is not valid JSON
    at /var/task/build/server-renderer.js:331082:32
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)