An Update is needed

This shows when I click the open in new window tab and when I view the plugin on the website {“error”:”Cannot add woocommerce user | WriteError({\”code\”:11000,\”index\”:0,\”errmsg\”:\”E11000 duplicate key error collection: nowinstore.users index: username_1 dup key: { username: … and so forth. I see this plugin hasnt been updated in over 2 years now I feel like a fool for paying over $500 for a broken plugin.