Uh @Memo we need to talk. My transactions weren't going through until just now. I had 29 unconfirmed Memos. First confirmation, boom can Memo again. This needs to be fixed ASAP.
The reason for the error above is that most nodes only chain 25 unconfirmed transactions together. The way to get around that is using multiple UTXOs but it isn't easy to code for.
The memo.cash site went down for a bit but is back up now. Will invest in more robust/expensive server solutions ASAP. Long-term goal is total decentralization with mobile apps.