We have upgraded jenkins from version 2.263.4 to 2.277.4 recently and now we are observing issue whenever we try to save any changes in existing pipelines it is not getting save. Its intermittant in nature. whenever I click on save button I am getting page stating this page is not working(server didn't send any data). Attaching the error screenshot. 

Also, whenever I click on save button below log line gets added into logs with warning.

2021-07-07 14:03:22.303+0000 [id=656] WARNING o.a.h.c.p.ResponseProcessCookies#processCookies: Invalid cookie header: "Set-Cookie: AWSALB=mMHaLwRSOmSR9kXAUD8u+dh6MwTzqrHpqxG7vYFUOuzPVW3zCRqtRNiKel9697oCD0VGSOdQ3kzt+P7UBSXi7Ovw9wSurTGNY2xR9KtQgqoWUvzGAQSNs4XG2356; Expires=Wed, 14 Jul 2021 14:03:22 GMT; Path=/". Invalid 'expires' attribute: Wed, 14 Jul 2021 14:03:22 GMT

We updated plugin Apache HttpComponents Client 4.x API Plugin as well but still facing the issue.

Can someone help here?