Hello. Try deleting all site files from the hosting and re-uploading it.After that, clear your browser cache and check again.

Hi,

The problem didnt solved, still exists !!!!

Regards

Hello Aristotelis 

I would like to reassure you that, even though Google recommends avoiding 404 errors, your website won't suffer major penalizations due to something like this

The matter is still open to be fixed by the developers. Until it is done and resolved though, you will hardly ever encounter a loss of ranking due to something like this

I will notify you here as soon as news on this becomes available

Thank you

Stefano