Hello,
On the edit imap section of helpdesk, I get the following warning. please advise.
Warning: imap_close(): 21 is not a valid imap resource in /home/eh/support.eh.com/class/class.imap.phpon line
Expected release date: 09.04.2018
Fixed a bug when all operators are offline, chat was hidden. Small bug fixes.
Release date: 11.04.2018
Bug fixes and PHP IMAP improvements code optimisation.
Release date: 17.05.2018
Move all options from the dashboard to the admin panel. Bug fixes.
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Warning: imap_close(): 21 is not a valid imap resource in /home/eh/support.eh.com/class/class.imap.phpon line 56
Most likely there is an error and imap_open returns FALSE which is not a valid resource to be passed to imap_close.
Please check your imap details, it probably can't connect and therefore the imap_close will return an error.