Poshmark sessions last about 30 days. When one expires, the Poshmark card on the Marketplaces page no longer shows your account and Poshmark listings fail with a red icon on the product row.
Sign in to Poshmark.com in a normal tab, then open Marketplaces and switch the Poshmark toggle on again. The extension refreshes your session in the background — your active listings, sharer schedule, and refresher cycles are not affected.
Watch the step-by-step video guide