EINSTEINIANS: EINSTEIN'S EQUATION IS WRONG

Pentcho Valev wrote:
In 1911 Albert Einstein showed that, in a gravitational field, the
speed of light varies in accordance with the equation c'=c(1+V/c^2)
where V is the gravitational potential. The equation is consistent with
the redshift factor 1+V/c^2 which means that the redshift is due to
variable speed of light and therefore there is NO GRAVITATIONAL TIME
DILATION. Finally, the application of the equivalence principle
converts c'=c(1+V/c^2) into c'=c+v where v is the relative speed of
the light source and the observer, in the absence of a gravitational
field.

Clearly the equation c'=c(1+V/c^2) is fatal for Einstein's theory so,
in order to save the theory, Einsteinians are forced to declare
Einstein's equation c'=c(1+V/c^2) wrong:


"In the second place our result shows that, according to the general
theory of relativity, the law of the constancy of the velocity of light
in vacuo, which constitutes one of the two fundamental assumptions in
the special theory of relativity and to which we have already
frequently referred, cannot claim any unlimited validity. A curvature
of rays of light can only take place when the velocity of propagation
of light varies with position. Now we might think that as a consequence
of this, the special theory of relativity and with it the whole theory
of relativity would be laid in the dust. But in reality this is not the
case. We can only conclude that the special theory of relativity cannot
claim an unlimited domain of validity; its result hold only so long as
we are able to disregard the influences of gravitational fields on the
phenomena (e.g. of light). Albert Einstein - 1920.

Light passing near the Sun slows down as measured from the Earth. But
if one measured its speed on location in the gravitational field of the
Sun, measurements done there would indicate the light was travelling at
c due to the effect of the time dilatation there on the measurements.
Why is there any contradiction here?

Double-A