Nexus 5 gives Status 7 error when flashing 5.1 OTA

I've been trying all day to install 5.1 OTA via ADB. In my struggle, I tried installing TWRP to try to get it to work, but it didn't. I since flashed the stock recovery.

When trying to flash via ADB, this is my output log:

Finding update package...
Opening update package...
Verifying update package...
Installing update...
Verifying current system...
"System/bin/install-recovery.sh" has unexpected contents.
E:Error in /sideload/package.zip
(Status 7)

Installation aborted.