plg_gkcontact and sending mails

The module does not send mails. Maybe I do something wrong while plugin adjusting?
First of all, in Joomla Global Settings I have inputted parameters of all methods: PHP mail, Sendmail, SMTP. But while trying send an mail PHP mail and Sandmail report that "The message was sent!" and SMTP says that: "Fatal error: Cannot access protected property JException::$message in /home/virtwww/w_podtverzhden-rf_c8b4b279/http/plugins/system/plg_gkcontact/plg_gkcontact.php on line 255". I am not good coder to understand that it means. Can anybody says to me what should do in this case?
And in the end I do not have any received mail in my mailbox.

Hello,

First of all - did you tried to use the newest version of the plugin?

All the plugins and modules are up to day

Please attach me your plugin file which returns this error, because in the 255 line of the last version there is no $message property.

Sending file

Please attach me your plugin file which returns this error, because in the 255 line of the last version there is no $message property.

Sending file

Please try to install the attached version of the plugin.

Thank you! Now it works.
Merry Christmas and Happy New Year!)))