Sometimes names that are transferred into Namebase from external wallets aren't tracked properly so when the name owner attempts to update their blockchain records, we'll send it to the wrong wallet that doesn't actually own the name resulting in an "Error sending update to the network. Did you recently submit another update?" message. This can happen too if you purchase a name from the marketplace (since that name could've been transferred in).
Solution is to just ping Namebase support or DM me in the Namer Community about the name and we'll implement a quick manual fix.