Add Products Manually Button in configuration is not working properly.
I already create simple products in my admin catalog, but in during configurable product when i configure simple product then i'm facing trouble. Add Products Manually Button is not showing. when i create new simple product from configure > attribute and then select attribute and after finish this long process complete then (Add Products Manually Button) is showing and then i can select my own simple products. Please help me regarding about this issue. i'm wasting too much time due to this long process.