Are you referring to the post cover? It already does add an alt attribute on the image. Where are you seeing this?

from a service online called semrush, a seo service

from a service online called semrush, a seo service

I am not quite sure I understand you here, can you provide us one of the post link which "com_easyblog/themes/wireframe/images/placeholder-image.png" placeholder image you referring?

Hi, I really need this to be solved, and still I didn't.
You can see this error here, for example:
view-source:https://greenme.it/spazi-verdi/verso-terra-nova

Thx, Mario

And this one components/com_easyblog/assets/images/default_blogger.png

here: view-source:https://greenme.it/spazi-verdi/3297-istinto-predatorio-esiste-anche-nei-gatti-domestici

Hello Mario,

I tried to check the page at https://greenme.it/spazi-verdi/verso-terra-nova and it looks like those are images that you embed into the article. You need to manually set the alt tag as this is not controlled by EasyBlog.

I can't seem to login to the back end or the ftp of your site to check on this. Can you please provide us with the appropriate access?

Hi Mark!
Sorry it is about all blogger's pages. Not inside articles (apart the other one I've passed), and nothing is related a single blogger, is about all
In source page I see this
<meta itemscope itemprop="mainEntityOfPage" itemType="https://schema.org/WebPage" itemid="https://google.com/article"/>

<div itemprop="image" itemscope itemtype="https://schema.org/ImageObject" class="hidden">
<img src="https://greenme.it/components/com_easyblog/themes/wireframe/images/placeholder-image.png"/>
<meta itemprop="url" content="https://greenme.it/components/com_easyblog/themes/wireframe/images/placeholder-image.png">
<meta itemprop="width" content="600">
<meta itemprop="height" content="300">
</div>

I was unable to connect with your FTP server, this is what i hitting now :

Command:	PASS ********

Response:	530 Login authentication failed

Error:	Critical error: Could not connect to server

Can you try download my attached file and replace into this following file location and see how it goes?
JoomlaFolder/components/com_easyblog/themes/wireframe/blogs/latest/default.main.php

hi, yes solved. Thx
Will it be replied in the next update?

You're welcome, this fix will included in next release version as well.

As a gentle reminder, kindly start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiry. I will lock and mark this thread as resolved.