Bring image & employee from another table

Hi, im looking for help to build an expression that gives to me signature & employee’s name from another table as initial values.

I read all guides you have and the following article:

I do all the steps as describe in the support but the initial value didnt work. Only gives me a blank field.

maybe im doing something wrong because i dont understand if the expressions are ok why didnt work.

screenshots continue below. I cant post all in one comment cause im tagged like new user.

i appreciate any kind of help and thank you so much.