I can’t find anything confirming this is what happened. The only thing I can find is a BBC article that says this:
Last week, there was high-profile coverage when a school in Lincolnshire, with few ethnic minority pupils, was not found to be outstanding because pupils lacked "first-hand experience of the diverse make-up of modern British society".
This was reported as a school being criticised as "too white".
Ofsted chief Sir Michael Wilshaw has said it is "nonsense" to claim that schools would be criticised by inspectors for being "too white".
www.bbc.com
There is a Telegraph article that discusses it which I suspect is what inspired this meme. It says in the opening lines, “downgrading a top rural primary school for
effectively being too English....” “effectively” meaning that actually, Ofsted did not say this and it’s just what the journalist interpreted their recommendation to mean. It’s an astoundingly stupid interpretation IMO.
You can probably find the original Ofsted report and I guarantee you it does not say “this school is too white” anywhere inside it.