Eannounce-2.21, operation did not completed successfully

[amphetamine]

follow the instruction,
send mail operation did not completed successfully

MantisBT 2.21.1
PHP 7.3.4

[amphetamine]

although screen shows "Operation did not completed successfully", mail sent and received.
--

another issue is whenever adjust "Sender threshold", reporter, updater, developer or manger, there is no change (no send email messages tab) on personal profile page

[cas]

Please report to the owner of the plugin, perhaps he/she can explain.