Google index issue 
Author: Marius T.Good evening
I am wondering if I am the only one confronting with the Google Webmaster Tools issues.
Briefly, I receive at least one message in 2 weeks regarding indexing problems.
This one is driving me crazy: the home page got ptoblems. This can lead to indexing problems. Here is the warning:
"Duplicate without canonical page selected by the user"
This is reffering to http://www.softedu.eu so to the landing page.
I have asked here and Mr. Franz Josef did confirmed that the canonical tag is properly inserted. Also the .htaccess is properly configured due to the same help mentioned above.
More: like in a really Institute of Mental Health I can read this title above the warning:
"Alternative page with the appropriate canonical label"
So the tag is appropriate. Few rows bellow I can read:
"Validation failed".
What should I do!?
This problem may have more reasons than what we have explored so far. You may find a solution in this article that describes some reasons for the error to appear
Author
Thank you for time spent in searching. I will read and reply.
Kindly Regards!
Author
Meanwhile, can someone explain the difference between "Set comment as useful" and "Set this comment as "correct"? One is closing the topic and the other not. it's too hazy for me ...
With the first, the green thumb, the comment is marked as helpful. All users can set this if they find the comment useful or good. The green tick means that the comment marked in this way is correct and possibly the solution to the problem. This one can only be set by the author of the post and closes the post for other users.
Author
Well ... I did read it. This is going to be more confusing because:
I have properly insert canonical
There are no Rank Math here
There is no 301 redirect
The X5 website program does not duplicate pages in responsive design
The othet pages are correctly read by crawler but not the index page despite the fact they all got the same canonical syntax.