Question: error in solving two coupled ode equations

Hi everyone i've tried to solve two coupled nonlinear ode but maple gives me these two errors can you help me with this?

 

ode1 := diff(f(x), x, x, x)+3*f(x)*(diff(f(x), x, x))-2*(diff(f(x), x))^2+g(x) = 0;
 ode2 := diff(g(x), x, x)+(3*10)*f(x)*(diff(g(x), x)) = 0;
 bcs1 := (D(f))(0) = 0, f(0) = 0, (D(f))(6) = 0;
 bcs2 := g(0) = 1, g(6) = 0;
 sys := {bcs1, bcs2, ode1, ode2};
 dsn := dsolve(sys, numeric);
 print(plots:-odeplot(dsn, [x, g(x)], 0 .. 6, color = black))

 


Error, (in dsolve/numeric/bvp) Newton iteration is not converging
Error, (in plots/odeplot) input is not a valid dsolve/numeric solution

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