Entity Reference subfield - ECA unable to work with

You can see full list of available tokens in the help section: /admin/help/token

In your case, it appears you need to replace :value with :entity

Try that please and update the ticket.

Thank you for your input, but unfortunately ,the same result, except instead of ref.number "3" it uses "username" when I try with "entity".

ECA Build form - Load via Reference (process_k086hog) for event eca.form.build: Field coaston does not exist for entity type node/project..\n\

Looking at the LoadEntityRef action plugin here: https://git.drupalcode.org/project/eca/-/blob/3.0.x/modules/content/src/..., I don't really see how this is gonna work with any tokens. The code looks to make implications that its a regular entity reference field with defined structure that custom_field doesn't match up to. I would post this issue in the ECA slack channel with the link above and your issue as I believe this action plugin would need to be modified to support custom_field references. I'm gonna close this out as there's not really anything else I can do to support this.

I'm not surprised this doesn't work. The action plugin to load an entity from an entity reference field is for reference fields in an entity, not for entity fields inside something else, e.g. a custom field.

So, that action plugin is not helpful here. But if the custom field module provides tokens for this, there is no need to use that action plugin in the first place. You do have that token available already and can use that directly.

Thank you guys, it works as expected. So the solution is very simple here.

For others with a similar problem: There is no need to use Action(task) called "entity:load via reference", but for custom_field use just direct token instead.

My profile fields:

so I was able to use direct token in ECA :
CustomFIeld: Required role is <strong>[buildstart:field_custom_pm:pm:entity:field_type_of_user]</strong>and assigned user will be: [buildstart:field_custom_pm:pm:entity:field_user_information]

and this is expected result:

Such a simple solution and I have spent like 3 days :D