When you say there is a limit on unspent outputs, what exactly does that mean? As I mentioned above, the only transactions are when I receive the WCG payments and is at most once a day if not every couple of days. Sometimes it takes up to 4 days to get the award.
I meant, there is a limit of how many inputs (MAX_INPUTS_PER_PAYMENT_MESSAGE) and outputs (MAX_OUTPUTS_PER_PAYMENT_MESSAGE) can be in one transaction. I double checked that it's 128, so if you have rewards set each day for year then all of these unspent outputs doesn't fit into a new transaction. But that should give different error message too, which is odd.
I would try to sent half of the amount to other wallet (you can create multiple wallets within app), if that didn't work, half of that. If it did work, then try full amount again. You could try to send to same wallet too, but I am not sure if that will fix the problem.
Can you join Obyte Discord server and ask further support from #helpdesk channel?
https://obyte.org/discordUsing that invite link gives me a message saying that I have been banned. No idea why.