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@tacolover101 is correct. ll /usr/local/lib/mk-livestatus/ might be instructive though.
Best thing to do is to disable livestatus. If Nagios works with it disabled, then I would definitely suggest tacolover101's comment. If Nagios is not working when you disable, can you post your nagios.cfg for review?
Do you know what versions of ndoutils and Nagios Core are in play here? It's almost as if your ndoutils was compiled against Core 4 but is attempting to be loaded by Core 3. Or that livestatus was compiled against Core 4 but is attempting to be loaded by Core 3. Some sort of version mis-match.
At any rate, the question posed by @dwhitfield is still the most pertinent one; Does Core work when livestatus is disabled? If so, then we have isolated the problem specifically to livestatus and ruled out potential problems with Core/ndoutils.
So, are you not using livestatus at all? *This* is the reason you should start your own thread instead of just adding on to a new thread.
It seems ls -la /usr/local/nagios/bin/ is the output we need. Please put the output in a code block. The "Code" button is the fifth from the left on the post input screen (between Quote and List).