Troubleshooting HTTP API Error: 'Failed to Parts Body Input' Issue

Can somebody check this table: Failed to parts body input is appearing in the http API - before I had it working but now there is again sthg. Table: https://app.clay.com/workspaces/258233/tables/t_MRS2QHKWH7i3/views/gv_5vKj6Dx2NPoU