AnsPress 4.0 Tag Permalink Not Working

Hi,

I changed tag and tags permalink but not working only custom tag permalink. Take 404 page.

But tags permalink work perfectly.

I changed tag permalink to default and working but not working custom tag permalink.

For ex:

https://anspress.io/questions/tag/4.0 -> working
https://anspress.io/questions/customperma/4.0 -> not working 404 page.

Thanks.