Images not showing after Craft 2 to 3 migration Hi upon migrating my site from Craft 2 to 3 I'm getting errors like this:

Twig Runtime Error – Twig_Error_Runtime
Variable "largeImage" does not exist.


"largeImage" refers to an image transform, this error happens with all image transforms where I've used an assets field to place a picture.

Also whenever I have embedded a picture inside an editor, this doesn't show either and the URL that is written out is:

 src="@baseUrl/images/image.png"


Clearly, something has gone wrong for @baseUrl to appear there. I've checked my base URL settings and it is set to "http://localhost:8888".

I don't know what else to try so any help would be much appreciated. Thanks.
I did manage to fix this problem with some support, however I now have a few other problems as a cause of this and I think it is best to try and start a fresh post on it. I had to change the baseUrl which fixed the error but now have broken images across the website and duplicate folders in my assets. Argghh.