Hm, not sure then, I wonder if you remember a different mission, or maybe someone had updated the stock one?
I wouldn't waste your time worrying about an error-likely a dead end.
Full mission builder is one of the buttons on the main game load screen. As the others said M4Today has some good resources, and you can always load an existing mission and tweak it (ex, replacing planes, ships, vehicles-fairly straightforward and the layout is easy to use)
I have a bunch of Tore's missions, and folks here in general are very nice about uploading their copies of stuff if a link is down. I'll upload the paearl harbor one tonight, as well as any others of his you want, if I have them downloaded-just shoot me a PM if that's the case.
Campaigns-everyone's taste is different. Depends what you play this sim for, have a historical interest in, etc. What do you like? I'd start with browsing the BAT sections on this site and M4T.
https://www.sas1946.com/main/index.php/board,265.0.htmlBrowse whichever era you'd like from the 4 on top (DOF, TGA, WAW, JTW)
Mission4Today is awesome as well! Here is their BAT ection.
https://www.mission4today.com/index.php?name=Downloads3&c=195Most of the missions from the common missions section (either SAS or M4t)will work in BAT too. (Just watch what the author says about the game version the developed it for, ex, DBW campaigns may need reworking to play in BAT, but pretty much anything else is usually OK.
https://www.sas1946.com/main/index.php/board,127.0.html