I downloaded and ran bluefish on various TC versions, additionally uunsquashed the extension from tc-4, no rc file exists.   On investigation I found that you have to change some preferences "Edit > preferences" and "Apply" those settings, at which time bluefish creates a config file 
this should remove those related error messages
Tested on TC-10 x86 with Xvesa, adwaita-icon-theme.tcz and aspell.tcz 
Also be careful not to run this as root, otherwise config files may get created in /root which might be undesirable 
Update:  editing preferences does indeed crest a config file and resolves the errors.  Also no issue with missing icons 
I'd rather use gedit, or editor but bluefish works great
For me anyway, I can't edit preferences.
And as I said above, I only d/l'd bluefish because it looked interesting based on it's description.
'Editor' is mostly fine for my general purposes.  I like that it highlights certain things based on their context.  But on this machine the font is too small and I don't know how to change it.  
I didn't have that problem with leafpad because I was able to figure out how to change it to a readable size, but leafpad didn't do the highlighting.
I use Notepad++ on my Windows machines and love it.  There is supposedly a notepadqq which is modeled after npp, but nobody has rolled that up for TC.   It's beyond my current skill set to even try, otherwise I already would have.
On your recommendation I'll have a look at gedit. Thanks.