@anjali_biddanda We also had the same error after upgrading to AEM 6.5.7.Solution:Please check and see If you have custom XSS rules? Check if the overlay exists: /apps/cq/xssprotection/config.xml.If yes, move the overlay to tmp and test again. After doing this change I have resolved the following is...

@extwebd96701854 Hello, we are also facing the same issue after upgrading to AEM6.5 SP6. Have you guys resolved this issue? any workaround for this?All most all of the Components are not saving in our case.

it worked thank you @Vish_dhaliwal