Hmmm... thought I'd try this even though it's older as I recently pulled my tilapia out of storage.
Currently using TWRP 3.2.1-0. If this doesn't work maybe an older version of TWRP may work? Not sure why but I've read similar issues on different threads/devices where this solved some sort of issue.
First try installing stuck on the C-Rom logo, perhaps this rom doesn't support f2fs. Seems that it should work because I got it to begin loading... I'll try ext4 for partitions next (can't remember what the stock formatting is). Well it installed, etc.
However doesn't seem to be a good installation or such. Pretty much all apps including trebuchet just stop working, also the only 2 apps I was able to install through the play store also won't work. I don't remember seeing this issue when reading through the thread but perhaps I'll try again tomorrow. Waited like 10 minutes after install, rebooted, cleared cache, etc.
Or, just another 'bust' for my old Nexus.:laugh: