Hi Miraja,
This log line is not expected. The plugin sets cookie to count site visits.
It seems some other plugin is already sending the output even before the cookie can be set.
This error is not an active issue and not reported on our site. I’m not sure which plugin is causing this issue.
I would suggest to
1) ignore this log line
2) keep all the plugins up to date
3) try deactivating the plugins one by one, open the site in incognito where announcement is active and check if the error is logged or not.
4) provide a temp admin creds to login and check the issue live – https://www.aakashweb.com/contact/
Hope this helps.
Thanks,
Aakash