Thanks- I have contacted coinos.io support too to ask if they can help. Have not heard back yet. BTW I just made a small test payment to another unrelated LN address from my coinos.io wallet - there was no problem at all.

Just tryed Bitcoinpredict payment again, still failure to process payment....new massage from wallet on failure- ERR Error running script (call to f_71cdd48ae74afa853d7e5040b5981ea5b94014de): @user_script:12: user_script:12: bad argument #1 to 'decode' (string expected, got boolean)

And trying again I get- 'Failed to route payment, recipient may not be reachable. Try sending a smaller amount or increasing the max fee reserve.' (for a prediction bet of 2100sats)