@madmax122133144 It sounds like a routing error, and one that seem to have a lot of different explanations and possible solutions. Is it just the house your sim cannot enter; or the park as well? Do you use mods and third party CC?
The first thing to try is exit the game and delete the caches in Sims 3 folder. They are called:
CASPartCache.package
compositorCache.package
scriptCache.package
simCompositorCache.package
socialCache.package (optional)
They will regenerate each time you start the game, and should be deleted every time you exit the game when troubleshooting; and regularly otherwise.
You can then make a copy of your save to test on, by saving it using the option Save As under a new name, for instance "test". Exit the game, delete the caches, and load your test save.
Go into Edit Town, evict the household to the clipboard, copy the house to the library, bulldoze the house, place out your copied house on the lot, move your household in again - all in the same Edit Town session. The sims living there will loose their wishes and promises doing this.
There are more suggestions to try if this does not work.