DarkRP lua errors

I have some lua errors, which I don’t have a clue what’s causing them…? Perhaps some of you guys have more experience with these errors than me…

PS. are these common errors I can simply ignore/should ignore most lua errors like this?
It may be conflicting addon or something? Even though nothing really related to any of these errors with addons (eg no addon relating to warrants/anything with pd apart from models)


Timer Failed! [4warranttimer][@gamemodes/darkrp/gamemode/modules/voting/sv_questions.lua (line 48)]

And this…

[ERROR] A runtime error has occurred in "gamemodes/darkrp/gamemode/libraries/fn.lua" on line 80.
The best help I can give you is this:
Attempt to call Name/Nick/GetName on a non-existing player!
	- No hints, sorry.
The responsibility for this error lies with (the authors of) one (or more) of these files:
	1. gamemodes/darkrp/gamemode/libraries/fn.lua on line 80
	2. gamemodes/darkrp/gamemode/modules/base/sh_entityvars.lua on line 105
	3. gamemodes/darkrp/gamemode/modules/police/sv_init.lua on line 282
	4. gamemodes/darkrp/gamemode/modules/voting/sv_questions.lua on line 15
	5. gamemodes/darkrp/gamemode/modules/voting/sv_questions.lua on line 48
------- End of Simplerr error -------
  1. error - [C]:-1
   2. unknown - gamemodes/darkrp/gamemode/libraries/simplerr.lua:467
    3. error - gamemodes/darkrp/gamemode/libraries/fn.lua:80
     4. Nick - gamemodes/darkrp/gamemode/modules/base/sh_entityvars.lua:105
      5. Callback - gamemodes/darkrp/gamemode/modules/police/sv_init.lua:282
       6. handleQuestionEnd - gamemodes/darkrp/gamemode/modules/voting/sv_questions.lua:15
        7. unknown - gamemodes/darkrp/gamemode/modules/voting/sv_questions.lua:48