Got exactly same errors, core is new and scripts are outdated. Server is very bugged it's just a prototype or sandbox.
Â
For missing spells I think it's core error. Or scripts changed in time and don't use some spell-effects.
Â
You can delete most scripts - and for example start on Outland, when you fix all sql related error you can move on to new areas. etc. but its stupid and long process.
It's possible to dump console errors to .txt file? I will be best option here.
Â
Â
I will hunt down some errors in my free-time.
And if u like to, post your fixes here, on this section for unsupported core. And when 5.4.7 final release will pop out we can post all of them in bug-tracker.