Title: Issue INVALID_PARAMETER_SYNTAX
Last modified: August 3, 2026

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# Issue INVALID_PARAMETER_SYNTAX

 *  Resolved [alaid](https://wordpress.org/support/users/alaid/)
 * (@alaid)
 * [6 days, 12 hours ago](https://wordpress.org/support/topic/issue-invalid_parameter_syntax/)
 * Hi,
 * Since updating to version 4.1.0, I’ve been getting the **“INVALID_PARAMETER_SYNTAX
   The value of a field does not conform to the expected format.”** error when paying
   with PayPal. I updated to version 4.1.1, but the issue persists. To resolve this,
   I’m using version 404.
 * I created a test version of the website with all plugins disabled except for 
   WooCommerce and PayPal. The issue occurs with both versions **4.1.0** and **4.1.1**.
 * I would appreciate your assistance.
 * You can access the test site if needed.
 * Thanks.

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Support [Syde Jamie](https://wordpress.org/support/users/jamieong/)
 * (@jamieong)
 * [6 days, 12 hours ago](https://wordpress.org/support/topic/issue-invalid_parameter_syntax/#post-18982259)
 * Hi [@alaid](https://wordpress.org/support/users/alaid/) ,
 * Thank you for reaching out to us, we are here to help.
 * Please follow these steps to share your system status report with us:
    1. Navigate to the `WooCommerce / Status` section in your site’s admin panel.
    2. Click on the `Get system report` button and then click `Copy for support`.
    3. Paste the report into our [PrivateBin](http://privatebin.syde.com/).
    4. After uploading, please share the link here so we can review the details thoroughly.
 * Alternatively, to speed up the whole process we suggest you to contact us directly
   for further assistance. You can open a ticket with our service desk. Here’s how
   you can request support: [Request Support](https://paypal.inpsyde.com/docs/request-support/).
   Please make sure to include the URL of this thread in your ticket for reference.
 * Best Regards,
   Jamie
 *  Thread Starter [alaid](https://wordpress.org/support/users/alaid/)
 * (@alaid)
 * [6 days, 12 hours ago](https://wordpress.org/support/topic/issue-invalid_parameter_syntax/#post-18982281)
 * Hi,
 * I opened a ticket with their customer service. Once I receive a response regarding
   the resolution of this issue, I will post it here.
 * Thanks.
 *  Plugin Support [Syde Jamie](https://wordpress.org/support/users/jamieong/)
 * (@jamieong)
 * [6 days, 12 hours ago](https://wordpress.org/support/topic/issue-invalid_parameter_syntax/#post-18982306)
 * Hi [@alaid](https://wordpress.org/support/users/alaid/) ,
 * We received your request and we will provide support directly.
 * Best Regards,
   Jamie
 *  Thread Starter [alaid](https://wordpress.org/support/users/alaid/)
 * (@alaid)
 * [3 days, 15 hours ago](https://wordpress.org/support/topic/issue-invalid_parameter_syntax/#post-18985463)
 * Hi,
 * The issue occurs when adding a quantity of product less than 1, for example 0.5.
   This issue was resolved in version 4.1.2.
 * Thanks.

Viewing 4 replies - 1 through 4 (of 4 total)

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 * ![](https://ps.w.org/woocommerce-paypal-payments/assets/icon-256x256.png?rev=
   3234615)
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 * 4 replies
 * 2 participants
 * Last reply from: [alaid](https://wordpress.org/support/users/alaid/)
 * Last activity: [3 days, 15 hours ago](https://wordpress.org/support/topic/issue-invalid_parameter_syntax/#post-18985463)
 * Status: resolved