Icons / symbols missing on the role center

[OigresSyn]

I added some icons/symbols to my Rolecenter Cues and actions but they are not shown.

Example for actions:

actions
    {
        area(Embedding)
        {
            action("New Artist")
            {
                Caption = 'New Artist';
                RunObject = page "SPO Artist Card";
                RunPageMode = Create;
                ApplicationArea = all;
                Image = Add;

            }

        }

Example for cue groups

cuegroup(RoleCenterContents)
            {
                Caption = 'Contents';
                field(Artists; Artists)
                {
                    ApplicationArea = All;
                    Image = Person;
                    DrillDownPageId = "SPO Artist List";
                }
            }