es mangelt

there is a lack of

→ es
phrase Rare #44,666
there is a lack of Usually used with „an“ plus a noun: „Es mangelt jemandem an etwas“ means that someone lacks something. The person is expressed in the dative.
GE: Es mangelt ihm an Entschlossenheit.
EN: He lacks determination.

Es mangelt Ihnen an Überzeugung.

You lack conviction.

— Marvel's The Avengers (2012)

Es mangelt Tom an Selbstvertrauen.

Tom lacks self-confidence.

Es mangelt Tom an Durchhaltevermögen.

Tom lacks stamina.

Es mangelt ihm an Entschlossenheit.

He lacks determination.