Ok got the same problem here after moving my install a folder up
htaccess.txt was already renamed to .htaccess and still is.
But the error doesnt go away!
oops... my .htaccess file is empty... is this ok???
-- disabled seo and thing ere ok, but enabling seo returns the same error
Have to work now for a week in a different country, but will read this and hopefully fix this next week.
Thanks for the info if there is any
-- update hahaha i disabled seo and then deletet the .htaccess file on the server... then i re uploaded the htaccess.txt again and renamed it to .htaccess... enabled seo and it worked...
Curious what i did wrong with the first file....