I followed u3mur4's guide to set up my masternode but am running into an issue when starting the node.

I continually get Error: could not allocate vin. Everything is inputted correctly in the create node tab as well as both of my .conf files.
Any input on a solution?
Maybe pertinent, when looking in coin control features the 5000SYNX for my node does not show up but on my dashboard is stated they are available.

When creating the masternode I send the 5000SYNX to an internal wallet as I already had a couple staking rewards. This hasnt been an issue with any other masternodes I have set up.