This is likely an issue with how you have assigned values to your cell array. Rather than assigne a table to a cell, assign its value. See this page on how to access data in a table.
a=5; A = table(a);
% Assigns table
C{1} = A
% Assigns value
D{1} = A.a
Better yet would be to use a table to capture all your values rather than a cell.
a=6; b=7; c=8; d=9; e=10;
data = table(a,b,c,d,e)