A couple of syntax issues: You currently have this:
* *Death record. Database szukajwarchiwach.gov.pl ,Scan 60, right side, Przeczyca, record #3. [[https://www.szukajwarchiwach.gov.pl/en/jednostka/-/jednostka/19270749?_Jednostka_delta=20&_Jednostka_resetCur=false&_Jednostka_cur=3&_Jednostka_id_jednostki=19270749]] for Thecla Nawracaj, age 72, widow of Antoni Nawracaj, maiden name is Kukulka, house #6.
When you create an external link it should be of the form:
[url more text here]
you have:
[[url]]
You also have two * characters at the start where you only need one.
Apart from that it seems fairly complete.
I don't know if you use the WikiTree Sourcer extension but I recently added a feature called Citation Assistant that helps you create a citation for sites like this that Sourcer does not yet support.