First, open your league in Chrome. Then open a new tab and go to this URL: chrome://inspect/#workers - that should show something like "https://play.basketball-gm.com/gen/worker-2018.05.05.1163.js" with an "Inspect" link under it. Click "Inspect". That will open a new window where you can run commands. In that window, run this (copy/paste the whole block of code at once, and then press enter):
bbgm.idb.league.tx("players", "readwrite", tx => tx.players.iterate(p => {
let update = false;
for (const ratings of p.ratings) {
if (isNaN(ratings.oiq) || isNaN(ratings.diq)) {
update = true;
break;
}
}