Thanks for your help!
I tried not to encode path to the file with base64, but just set the local path to it.
It was default: this.logo.src = “data:image/jpeg;base64,/9j/4QAYRXhpZgAASUkqAAgAAAAAAAAAAAAAAP/sABFEdWNreQABAAQAAAAlAAD/4QMpaHR0cDovL25zLmFkb2JlLmNvbS94YXAvMS4wLwA8P3hwYWNrZXQgYmVnaW49Iu+7……..”
I tried: this.logo.src = “Art/Default.png”;
And it works! It shows local image file.
PS. Why it is not documented? It’s rather basic and important thing.