If you can’t access the spreadsheet editor even though you’re an Admin user, it’s probably due to wrong settings in our plugin.
You can fix it by going to your WP Dashboard > WP Sheet Editor > Settings > Reset Settings.
By doing this, you should be able to access the editor and configure as a fresh installation.
Note: If you don’t want to reset the settings because you don’t want to lose your saved searches or column views, you can go to your dashboard > WP Sheet Editor > Settings > Customize Features > User roles that can use the spreadsheet editor > Make sure Administrator is selected.