。
The problem is that he's broke.
Literal
Problem [topic-は] he [subj-が] penniless [literary-である] [nom-という thing-だ].
文無し ('penniless, broke,' lit. 'without a single bun') — a colorful native word for being out of money. 文 was an old Japanese coin; 一文なし ('without even one 文') survives in this compound. である literary copula + ということだ explanatory closure.