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Last two days suddenly my logs are filled with this in Magento 2.3.2:

report.ERROR: Unable to send the cookie. Size of 'mage-messages' is 4191 bytes.

In Stores>Configuration>General>Web

My Default Cookie Settings are:

Cookie Lifetime: 3600(default)

Cookie Path:

Cookie Domain:

Use Http only: Yes

Cookie Restriction Mode: No

Does anybody have this issue? Can't find something related when I searched about

  • Any luck on your side finding anything about it? – ChaosTheoryV2X Aug 8 at 20:31
  • @ChaosTheoryV2X No sorry... – G. G. Aug 29 at 23:27
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The error is because in the cookie mage-messages exists exception trace. Try to increase the value of \Magento\Framework\Stdlib\Cookie\PhpCookieManager::MAX_COOKIE_SIZE = 40960; And see in a browser response header value for set-cookie: mage-messages

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