Connecting means the login is still running, so wait, then look for Verification code or a missing proxy country. Do not add a second sender for the same LinkedIn account.
Wait, then read the panel
The panel updates when LinkedIn is ready. A second Add sender starts a new login and wastes a seat.
Stay on the sender that shows Connecting.
Wait for the panel to move. Do not refresh into a new sender.
If you see Verification code, enter it and select Submit code.
If LinkedIn still needs an extra check, stay on this sender and select Mark complete.
If the panel says "Assign a country proxy in the Proxy tab, then save.", assign Managed country, save, then connect again on this sender.
Needs login after Connecting means save credentials and connect again on this row. Challenge required is progress, not a stuck state.
If nothing changes
Confirm you are Owner or admin. Members cannot submit a code or mark complete. Confirm the kill switch is off only after status leaves Connecting. Connecting is not Paused and not No seat. No seat is a badge. If you already added a second sender, ignore it and return to the first Connecting row.