Error in Email configuration

I am getting the below error on version 11.1.9 while configuring email account.

Uncaught TypeError: Cannot read property ‘label’ of undefined
at o.get_value (multiselect.js:41)
at o.get_value (class.js:53)
at o.get_values (multiselect.js:71)
at o.get_data (multicheck.js:1)
at o.get_data (class.js:53)
at o.get_awesomplete_settings (autocomplete.js:38)
at o.get_awesomplete_settings (multiselect.js:11)
at o.get_awesomplete_settings (class.js:53)
at o.setup_awesomplete (autocomplete.js:74)
at o.make_input (autocomplete.js:12)
get_value @ multiselect.js:41
(anonymous) @ class.js:53
get_values @ multiselect.js:71
get_data @ multicheck.js:1
(anonymous) @ class.js:53
get_awesomplete_settings @ autocomplete.js:38
get_awesomplete_settings @ multiselect.js:11
(anonymous) @ class.js:53
setup_awesomplete @ autocomplete.js:74
make_input @ autocomplete.js:12
(anonymous) @ class.js:53
t @ base_input.js:60
refresh_input @ base_input.js:85
refresh @ base_control.js:95
attach_doc_and_docfields @ layout.js:319
refresh @ layout.js:217
make @ field_group.js:23
(anonymous) @ class.js:53
make @ dialog.js:46
frappe.ui.Dialog @ dialog.js:17
make @ communication.js:16
init @ communication.js:15
_f.Frm.email_doc @ form.js:265
(anonymous) @ toolbar.js:130
dispatch @ jquery.min.js:3

I have another instance, which is on version 11.1.3, where I am able to send mails as usual.

Can someone suggest what can be done…

There is an outstanding bug in 11.1.9 regarding email. See GitHub issues in Frappe

Reported here https://github.com/frappe/erpnext/issues/16742

See also https://github.com/frappe/frappe/issues/6968

Thank you… Solved now