Hot to recreate Userdata partition in Nexus 7 (2013)

[cooljeff913]

So, I tried to changed the partition sizes on my 16gb Nexus 7 (2013) to install GAPS after upgrading ROM.
Needless to say, the process failed in a major way and I tried to restore using factory original ROM.

After many tries, I was able to get the ROM to load, but my Userdata partition is set to 0 bytes and I can not fix it in TWERP.
I have tried the Format UserData command in Fastboot, but receive the following messages:
C:\Users\JEFF\Downloads\platform-tools>fastboot format userdata
mke2fs 1.45.4 (23-Sep-2019)
mke2fs: invalid blocks '0' on device 'C:\Users\JEFF\AppData\Local\Temp\TemporaryFile-a15116'
C:\Users\JEFF\Downloads\platform-tools/mke2fs failed: 1
fastboot: error: Cannot generate image for userdata

Is there any way to recreate this partition?