issue during mining a block

[zoeleesss]

This happened when i tried to mine a block in naivecoin-vue frontpage. The block number was 11 and I tried to add a block by mining.
(https://user-images.githubusercontent.com/31149915/37551904-23df1ae4-29e5-11e8-88ba-92952f72c348.png)

The following error occurs:
(https://user-images.githubusercontent.com/31149915/37551901-f0d8528c-29e4-11e8-9c35-c589b895d5f7.png)

and btw, i wonder if there is a way to communicate with you and ask you serval questions about your amazing codes?

[zoeleesss]

hey, sir . I figured the issue out. And i created a pull request. Hope you will merge it.

[duzluk]

hi, how did you resolve this problem?