Hi,
can you please send me a link where should visible the avatar? at the link you provided I see the avatar but it comes from the Easy Profile Author plugin (not from string {user ....} )

Sorry but I does not understand where is the code. Can you please guide me where in the backend I can find the code that should generate the avatar?

Hi,
ok, found the issue, content plugin works with user ID, it can works also with username but the space will not works with content plugin if contain spaces.

All content plugin use a word as parameter but if you have a space (for example My Username) then the result will be something like this {user avatar My Username} and parameters will be :
user: which content plugin
avatar: param 1, the field
My: param 2, the Id of the users
Username: param 3, nothing

Unfortunately there is not way.

It is designed to work with IDs but why works also with usernames? because to find user data we use Joomla function "JFactory::getUser()" and in case of usernames it still works, but it is only a case.

Hi I understand that it is not possible with a space in the username, but is it possible to limit the input of the username in a profile to a username without a space? So in options username field, set the custom format so that only contiguous characters without a space are possible? I don't know how to set that up.

Will it maybe possible in the new joomla 4 version? So i can show an avatar field?

but is it possible to limit the input of the username in a profile to a username without a space?

Yes, this is possible, set the username parameters like screenshot (Components->Easy Profile->Choose Username).

With this configuration the only chars available are uppercase (A-Z), lowercase (a-z), numbers (0-9) and chars like "-" and "_"