"Unable to find partition size for path '/emmc'" when trying to install anything through TWRP on Levono TB2-X30L

I have Lenovo TAB 2 A10-30 (TB2-X30L). While trying to install custom ROM or almost anything through TWRP, it shows:

E:Mount: Unable to find partition size for path '/emmc' 
E:Unmount: Unable to find partition for path '/emmc' 
E:Mount: Unable to find partition path for'/emmc'

Then after some process, it shows

E: Legacy property environment did not initialize successfully. Properties may not be detected

As of now, I don't have a ROM installed, so I am not able to use the device at all. When I try to install any ROM, it reboots and opens TWRP. How can I fix these errors to be able to return to stock recovery or install any ROM?