So I just installed CM12 for my Sprint Galaxy S4 using TWRP 18.104.22.168, after doing the format of the internal SD and factory reset (guessing the factory reset after format is probably not needed). I installed the cm-12-20150302-NIGHTLY-jfltespr and gapps-L-2-25-15. It loads the splash screen for CM, upgrades all the apps, and then once it comes up for me to start configuring CM I get tons of pop ups stating all the gapps have unfortunately crashed. Any idea what I've done wrong and how to fix it? Unfortunately, I think I deleted the backup I took when I did the format. I'm looking for an old backup I think I saved to my gdrive, but hopefully there is a simple fix to my dilemma?
Try different Gapps package, my recommendation is PA-GAPPS (notice: they work on all ROMs, not just Paranoid-Android) This is in case that the only apps that are crashing are Google apps. In case all apps crash, you might not have wiped correctly before installing.