I am unable to fish on my lots, I can't fish at all. My sims won't even fish autonomously. I click the pond and the pie menu flashes up briefly then it is gone like I cancelled it.

Have you checked for mod/hack conflicts? Sounds like it could be that.

Check your game for mods/hacks that have anything to do with ponds/fishing or similar (assuming you have your hacks/mods in a separate subfolder, which makes looking for issues a lot easier), and if you can't find anything, run the HCDU to see if that one finds something.

Turning on Testingcheats to see if the problem causes an error (and error log) can also be useful.

More detailed guide:
https://modthesims.info/wiki.php?ti..._Custom_Content

Useful tools:
https://www.picknmixmods.com/Sims2/...s/HcduPlus.html (HCDU)
https://www.picknmixmods.com/Sims2/...CausedThis.html (error log reader)

I figured it out: When I turned on testingcheatsenabled and went into a sim's home, I got an error related to BoilingOil's NoSimLoaded. I killed that token and my sims was able to cook and fish just fine. So it's a problem with No Sim Loaded. This means I need to take that hack out and allow my sims to generate loaded tokens. :/

There's nothing wrong with those tokens and there's no actual reason to remove them.

Could be a conflict (or outdated mod), and NoSimLoaded just happens to be the one showing up in the error. Error logs can be useful, but they ca also be misleading at times.

Would run the HCDU to see what actually is conflicting, as NoSimLoaded shouldn't be causing problems all on its own.

No Sim Loaded frequently causes problems all on its own, because it has a dependency on Smarter EP Check, which people inevitably don't install. That's the exact reason I don't reference that mod in any of mine.