What's the reason behind empty seats at the DNC 2024?

The Democratic National Convention 2024 is going on in full swing with some of the most notable leaders of the Democratic Party addressing the mega event ahead of the US polls 2024, that will see VP Kamala Harris fighting the elections on behalf of the party against a Republican opponent and former US President, Donald Trump. However, rows of empty seats seen at the DNC 2024 has become a point of serious concern for the Democrats, say reports.