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Undefined index: Content-Type" "/home/noticetoownerphp/public_html/vendor/quickbooks/v3-php-sdk/src/Core/HttpClients/SyncRestHandler.php"

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Re: Undefined index: Content-Type" "/home/noticetoownerphp/public_html/vendor/quickbooks/v3-php-s...

Based on the error extensions, it seems that you're using an API tool, neotest07.

This error can occur if there is a problem with the tool's coding.


For you to get ideas on how to resolve the error, I want to direct you to the Intuit Developer Support page. We have engineers, developers, and even QuickBooks users in this forum. They can share their knowledge about the tool and how you can get through of the error.



We're always here to help you manage business data and make it successful. Have great day!