Troubleshooting Pega mashup issues caused by browsers blocking third-party cookies

Tharun K T
Thu, 04 Dec 2025 08:00:36 +0000
General

I recently tried using Pega Mashup and followed these steps to obtain the mashup code:

Case Type → Settings → API Integration → Mashup

I copied the mashup code and placed it inside a simple HTML file between the and tags.

When I opened the file in the browser, I received the message: “Third-party cookies must be enabled for this mashup.”

I enabled third-party cookies in the browser, but the issue persisted.

Next, I navigated to:
Configure → System → Settings → Cross-Site Request Forgery → Enable SameSite cookie attribute → none

After updating this setting, the mashup started working.

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