for(i = 1; i<=9999; i++) {
console.log("Iteration # --> " + i);
document.querySelectorAll('div[role=checkbox]').forEach(div=>div.click());
document.querySelectorAll('div[aria-label*="Select all photos"]').forEach(div=>div.click());
await new Promise(r => setTimeout(r, 3000));
try{console.log("Selected documents count for iteration [" + i + "]: " + document.evaluate('/html/body/div[1]/div/c-wiz/c-wiz[2]/span/div[1]/div/span', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue.innerText);}catch(ex){/*do nothing*/}
document.querySelector('button[title=Delete]').click();
await new Promise(r => setTimeout(r, 5000));
document.evaluate('//span[text()="Move to trash"]', document, null, XPathResult.ANY_TYPE, null ).iterateNext().click();
//wait for new images to load
await new Promise(r => setTimeout(r, 10000));
}
If the script throws above error, it means not all thumbnails are fully loaded. They need to be visible for the script to be able to detect them. Make your window a bit smaller or zoom in a bit instead of max zoom out.