Error on matlab 2020

[SitrakaResearchAndPOC]

what version of matlab did you use?
L(0, 2) = 0000000000000000
L(0, 3) = 0000000000000000
L(0, 4) = 0000000000000000
L(1, 0) = 0000000000000000
L(1, 1) = 0000000000000000
L(1, 2) = 0000000000000000
L(1, 3) = 8000000000000000
L(1, 4) = 0000000000000000
L(2, 0) = 0000000000000000
L(2, 1) = 0000000000000000
L(2, 2) = 0000000000000000
L(2, 3) = 0000000000000000
L(2, 4) = 0000000000000000
L(3, 0) = 0000000000000000
L(3, 1) = 0000000000000000
L(3, 2) = 0000000000000000
L(3, 3) = 0000000000000000
L(3, 4) = 0000000000000000
L(4, 0) = 0000000000000000
L(4, 1) = 0000000000000000
L(4, 2) = 0000000000000000
L(4, 3) = 0000000000000000
L(4, 4) = 0000000000000000
Error using hex2dec
Input must be text.

Error in bitxor_64 (line 15)
a_left_dec = uint32(hex2dec(a_left));

Error in SHA3 (line 74)
L(ix + 1, iy + 1, :) = bitxor_64(L(ix + 1, iy + 1, :), Lp(ix + 1, iy + 1, :));
Chears

[paulchen2713]

I use MATLAB 2018b. Now I know this code possibly doesn't work the same on newer verions. Thank you.