Bug in Joomla 4 with Jcomments

I am preparing the migration to Joomla 4 
I have done an update from Joomla 3.10.1 to Joomla 4.27 and updated Jcomments from to 3.07 to 4.27 (version compliant with Joomla 4)
When I activate the plugin events booking Jcomments There is this error message:0 Call to undefined method JComments::showComments()In Joomla 3.10 There is no problem 

any idea ?
 

Could be because something changed in their extension. I haven't looked at that extension for years, to be honest

Could you please send me link to the page which I can download the extension and check to see what change is needed to have it works with Joomla 4 ?

Regards,

Tuan

Here is thé Link for downloading Jcomments for Joomla 4
github.com/exstreme/Jcomments-4/releases/tag/v4.0.26
the update to 4.027 is done from Joomla update extensions but the issue is the same on 4.0.26 or 4.0.27
best regards

I made quick modification to the plugin. Could you please install this updated plugin to see if it works ?

Regards,

Tuan