There is a mod that conflicts with it a bit, Morph Mod.

Unfortunately it's not really something that I can fix since I would have to rewrite this to work with it. Thanks for the heads up though.

I found this bug of addon:

[[CW 2.0] Ammo Weight HUD] lua/autorun/server/ammoweight.lua:540: bad argument #1 to 'GetAmmoCount' (number expected, got nil)
1. GetAmmoCount - [C]:-1
2. unknown - lua/autorun/server/ammoweight.lua:540

Timer Failed! [Ammo Counter][@lua/autorun/server/ammoweight.lua (line 666)]

Can you fix it?

Thanks for the report. Ill look into this tonight. It looks like my ammo weight mod is throwing this error and not the life line addon. You are using both correct? Are you using the performance fix option in the ammo weight mod?

Yeah, I'm using correct both.

Alright I have recreated your error and I'm looking into it. Should be fixed soon by the end of the day, Thanks!

Alright I THINK I fixed it. It was harder than it should of been. I'm not going to push an update until I know it's fixed. So here is a .gma file for it. If you would please unsubscribe from the Ammo Weight mod and copy/past this file into the addons folder at "steamapps\common\GarrysMod\garrysmod\addons" and then test to make sure the error is gone I would appreciate it. Once you confirm that it works. Ill update the main one. I would recomend deleting this gma and re-subscribing back to the normal one so you will have access to future updates. Thanks again. Let me know if you have any issues.

https://drive.google.com/open?id=1MDmVvM3anrgYABty9Q5G6VFdrwJPm8F5

This mod has worked for me for a few years just fine. But now all of a sudden i am immortal. Like, i see the health go down, but once all the plus symbols are gone, i no longer lose health.

Hmm weird. So after your last life is gone you dont take any damage at all? I just went in and it seems to be still working for me. I know these are pretty obvious questions but i gotta ask. Have you added any new addons recently that may effect health/invulnerability? Are there any log errors in the console for this addon? I haven't touched this in years but ill help if i can.