Show!!! To adicionando aqui e o script caiu no primeiro if. Acho que para esse primero check deveria ser:

    if (
      totalContentsBeforeTabcoins.rows.length !==
      totalContentsTabcoinsAfter.rows[0].sum - totalContentsTabcoinsBefore.rows[0].sum
    ) {
      throw new UnprocessableEntityError({
        message: 'Number of added Content TabCoins does not match',
        context: {
          totalContentsBeforeTabcoins: totalContentsBeforeTabcoins.rows.length,
          totalContentsTabcoinsBefore: totalContentsTabcoinsBefore.rows[0].sum,
          totalContentsTabcoinsAfter: totalContentsTabcoinsAfter.rows[0].sum,
          addedTabCoins: totalContentsTabcoinsAfter.rows[0].sum - totalContentsTabcoinsBefore.rows[0].sum,
        },
      });

Porque no final das contas, o totalContentsBeforeTabcoins (conteúdos criados antes das TabCoins) deveria ser o mesmo número das TabCoins adicionadas, que é a subtração de totalContentsTabcoinsAfter com totalContentsTabcoinsBefore.

O que acha?