Thanks for reported this, it seems like we missed up this, I will log into our issue tracker regarding this issue.

And keep you update once our developer fix this in internally.

Hello! Do you have any news?

May i know is this domain site (brandup.pro) using EasyArticles extension?

If yes, can you update this domain site backend and FTP access so I will patch all these files on your site directly because it involved a lots of file and most of the file is same name, so that is difficult for me to attach those files in my reply.

Hello Arlex! No, my domain is - ds.brandup.pro like in site details..

Can I have the permission to help you update your EasyArticles extension licensed domain to ds.brandup.pro?

However, I already applied those fixes on your site, can you give it a check?

By the way, I noticed that language option didn't appear on your composer page, because that language option under this div container, so your custom css make it hidden.

#ea .ea-composer-container-header__selects {

    display: none;

}

If you would like to show this language option from the composer page, you have to customise this file Joomlafolder/components/com_easyarticles/themes/wireframe/composer/default/default.php and move that language option code to other line of code then override this file into your current template.

Yes, you can change if it matters!
Now I have deleted the customised file, and the language field has appeared. But now custom fields have ceased to appear..

Sorry Tima, I think I still feel a little bit lost here, may i know which customisation file you deleted? Because I still not see that language option on composer page, you can check my screenshot here : https://take.ms/iiWCr

And may i know which custom field are you referring? perhaps you can provide us some of the screenshot regarding this so we can better have a look?

I had a file - /templates/ja_social_ii/html/com_easyarticles/composer/templates/default.php
I deleted it .. because I do not understand how I can override it.. looks like it doesn't work..
i was changed my css file, so now language field should be displayed.

all custom fields you can find here - /administrator/index.php?option=com_fields&context=com_content.article

I did a little research, and found this weird -
If the site is in Russian, then additional fields are not displayed, and if in English, "page loading" and custom fields appear
I also created a menu item for composer, but after selecting an article template, the link looks like this -
/?option=com_easyarticles&view=composer&tmpl=component

After checked further regarding this issue, it seems like the default field label name (without assign any field group) using this language constants JGLOBAL_FIELDS to translate to "Fields".

But when you open the composer under other language like RU, so it will show different translation which caused this issue.

I've applied some fix under this file on your site JoomlaFolder/administrator/components/com_easyarticles/includes/field/adapters/com_fields.php , it should work fine now.

Can you give it a check again?

Hello! Thanks, now custom fields are displayed.
But when you select an article template, the link still turns into a system view - /?option=com_easyarticles&view=composer&tmpl=component .

It look like I was unable to open the file from your FTP server, can you try download my attached file and replace into this JoomlaFoldewr/components/com_easyarticles/controllers/posts.php and see if it still render the non-sef link?

Hello!
Now the sef link is displayed.
But this link is wrong ..
My menu item link is - http://ds.brandup.pro/en/encyclopedia/user-articles/composer
after select an article template, link becomes such - http://ds.brandup.pro/en/encyclopedia/user-articles/composer/composer

I will log into tracker regarding this, and update you once our developer fix this into internally.