Hi ​@Lukacs Adamis, thanks for reporting this! 

If the board is frozen after inserting a large Excel file, try opening it from a different browser or the Miro desktop app — that can sometimes free it up enough to delete the table. You can also try accessing the board from an incognito window or a different device to see if it loads.

If the issue persists, I’ll convert this into a support ticket so the team can check on the backend and help recover or stabilize the board without data loss.

Thank you ​@Eca! I tried all that and failed. Non of the browsers had enough memory, and the desktop app is basically a browser so it had the same issue. However I opened it on my iPhone app, and I was able to immediately select and delete the widget even before it loaded the table data.

The iPhone app must have a more efficient memory/object management.