If you are on v1.0.3 and still crashing, try deleting the game’s save data (back it up via JKSV first). Corrupted save files from version 1.0.0 often carry over. Alternatively, reinstall the base game using a clean dump.
: New physical copies are available at Walmart for $19.99 $24.99 and Best Buy for $19.99 $24.99 . LEGO Harry Potter Collection Switch NSP UPDATE
The v1.0.3 update is worth installing if you own the game physically or digitally and play on a modded Switch. It fixes annoying progression blockers and smooths performance in busy scenes like the Great Hall or Free Play mode. If you are on v1