Reference vanishes when number of authors are more than 4

Question

What could be the problem with following bibliography code? Problem is occurring when I try to add more than 4 authors, reference get added till 4 authors, if 5 or more authors, that reference does not appear.

For below entry I am getting reference printed in bibliography.

\usepackage[
backend=biber,
style=alphabetic,
sorting=nyt,
citestyle=authoryear,
maxbibnames=99, 
maxcitenames=2,
]{biblatex}
@ARTICLE{a5,  author={L.  {Barrett, R. Adolphs} and S. {Pollak}},  journal={Association for Psychological Science},   title={Corrigendum: Emotional Expressions
Reconsidered: Challenges to Inferring
Emotion From Human Facial Movements}, year={2019},pages={1-50}}


[![enter image description here][1]][1]

But when I add remaining authors like below, it does not get added to bibliography list

\usepackage[
backend=biber,
style=alphabetic,
sorting=nyt,
citestyle=authoryear,
maxbibnames=99, 
maxcitenames=2,
]{biblatex}
@ARTICLE{a5,  author={L.  {Barrett, R. Adolphs, S. Marsella, M. Martinez} and S. {Pollak}},  journal={Association for Psychological Science},   title={Corrigendum: Emotional Expressions
Reconsidered: Challenges to Inferring
Emotion From Human Facial Movements}, year={2019},pages={1-50}}

Answer 1

According to BibTeX syntax, which is also used by Biber, in both examples the article has two authors, the first of which has a very peculiar name: in the first case it is

L. (initial of given name) {Barrett, R. Adolphs} (family name)

and in the second case it is

L. (initial of given name) {Barrett, R. Adolphs, S. Marsella, M. Martinez} (family name)

The correct syntax would be, in the two cases

author={L. Barrett and S. Pollak},
author={L. Barrett and R. Adolphs and S. Marsella and M. Martinez and S. Pollak},