Please refer to the Dog Access Configuration section, there is an option restricting your access to the dog. Commonly overlooked is the radio channel option.
'You do not have a dog' Spam
The default keybind in the configuration file for cancelling a dog emote is X, which is frequently used by other roleplaying scripts. If you have not changed this default config option, or accidentally press another dog-related keybind without a dog, this message will appear.
You can disable this message by setting Lang.NoDog to empty quotes ("") in the shared/sh_lang.lua file.
Attempt to index a nil value (field 'lib')
RQ-Dogs lists ox_lib as a dependency on the CFX Forums. It is among the top 5 most-used FiveM resources, and simply needs to be installed and started before rq-dogs.
Download: https://github.com/overextended/ox_lib/releases/latest