New vendor not showing in Store Vendors menu in admin

Hello,
I have WCFM plugin installed in the site. I have settings that if any vendor registers, admin will have to approve it. But I have just noticed that new vendors are not getting listed under Store Vendors menu in admin. So they cannot be approved. We had 6 vendors previously. But new vendors are not getting listed.

Even when I click Pending Store Vendor button, this message is shown: Notifications: You don’t have permission to access this page. Please contact your Store Admin for assistance. Why is it showing?

Please help. It is urgent.

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