Carlos Cid

This is not required. I have already found the problem and a workaround.

Deactivating and re-activating the plugin fix the problem, as it triggers the code:

            $installer->addColumn('ahm_download_stats', 'version', 'varchar(255) NOT NULL');
            $installer->addColumn('ahm_download_stats', 'agent', 'TEXT');
            $installer->addColumn('ahm_download_stats', 'filename', 'TEXT');

On Installer::updateDB() and this code creates the missing columns.

Anyway I would suggest you to investigate why this code didn’t run during the plugin upgrade process.

Thanks for indirectly pointing me out the solution 😉

WP 5.6

PHP 7.3.19

I think the problem is that in the last upgrade of the plugin, the upgrade process is not upgrading the ahm_download_stats table structure.