<ref> and </ref>, the opening and closing inline citation tags belong in the bio section, either delete them, or move the entire text in your question into the Bio section, so:
In the Bio section (this automatically populates the Sources section)
George Edward Cook Smith was born on the 29 Dec 1864, he was the son of William Smith & Lavinia Jane Field, in Castlefin, Don, Ireland<ref>
'''Birth''':
"Ireland, Select Births and Baptisms, 1620-1911"<br/>
Original data: Ireland Births and Baptisms, 1620-1911. Index. Salt Lake City, Utah: Family Search; FHL Film Number: 101096<br/>
{{Ancestry Record|2533|1814409|au}} (accessed 30 October 2023)<br/>
George Edward Cook Smith born on 29 Dec 1864, son of William Smith & Lavinia Jane Field, in Castlefin, Don, Ireland.
</ref>
or in Sources section
*'''Birth''':
"Ireland, Select Births and Baptisms, 1620-1911"<br/>
Original data: Ireland Births and Baptisms, 1620-1911. Index. Salt Lake City, Utah: Family Search; FHL Film Number: 101096<br/>
{{Ancestry Record|2533|1814409|au}} (accessed 30 October 2023)<br/>
George Edward Cook Smith born on 29 Dec 1864, son of William Smith & Lavinia Jane Field, in Castlefin, Don, Ireland.