This error is received when trying to send too many inputs inside one address. The manual number of inputs you will need to select is roughly 1,000-1,500. Anything over this amount may give you the same Transaction Creation Error. If error is shown again, please try selecting a smaller number of inputs.
To resolve, you will manually select the inputs by following the steps below:
1) First go to; Main drop down menu > Preferences. The Options window below will appear. Select the checkbox “Display coin control features (experts only!)”. Click Apply and then OK.
2) Next, go to the Send Tab in wallet and click Inputs under Coin Control Features.
3) In the Coin Controls, manually select 1,000-1,500 inputs, or less (within one address) by clicking the drop down arrow on the address and then selecting the check boxes.
4) When completed, click OK, enter your Pay To address, Amount and click Send. *** Note. DO NOT put your address in the custom change address box. The Coin Control Features are only used to in this case to manually select inputs.
If you continue having errors, the video here shows a similar coin’s wallet and a walk though of the steps above to resolve the issue.