Now 4Seller Upgrade the new version in OTTO app, so the previous authorization in 4Seller may show inactive. Follow below steps to connect OTTO V2 in 4Seller.
Step 1: Click "Reconnect" turn back to OTTO backend
Step 2: Click "V1" to delete V1
Step 3: Go back to 4Seller click "Reconnect " to connect OTTO V2 to 4Seller
Step 4: In OTTO backend can see the newest status
Any problems just feel free to connect 4Seller support team: support@4seller.com