There is ONLY ONE FUNDAMENTAL ERROR in Einstein's relativity:
Einstein's principle of constancy of the speed of light:

http://www.fourmilab.ch/etexts/einstein/specrel/www/ "...light is
always propagated in empty space with a definite velocity c which is
independent of the state of motion of the emitting body"

is FALSE. Other mistakes, camouflages, plagiarisms etc. can be
regarded as secondary. If the scientific community wants to get rid of
Einstein's relativity (there are signs showing that it does), it
should first replace the false principle of constancy of the speed of
light with the true principle of variability of the speed of light and
draw all the consequences, even if, in the end, this turns out to be
an "awful" transition from Einstein to Newton. In the absence of an
explicit and universally accepted replacement, any anti-Einstein or
beyond-Einstein activities can only consolidate Einstein criminal cult
and prolong the agony.

Pentcho Valev