5.58 Maple can’t solve laplace equation and numerically

Maple 2020.

restart; 
PDE := diff(u(x,y), y$2 ) + diff(u(x,y), x$2) = 0; 
BC:= u(x,0)=0, u(x,100)=100, u(0,y)=0, u(10,y)=0; 
sol:=pdsolve(PDE,[BC] ,numeric); 
 
Error, (in pdsolve/numeric) unable to handle elliptic PDEs
 

Compare to

restart; 
PDE := diff(u(x,y), y$2 ) + diff(u(x,y), x$2) = 0; 
BC:= u(x,0)=0, u(x,100)=100, u(0,y)=0, u(10,y)=0; 
sol:=pdsolve([PDE,BC]);
 

\[ u \left ( x,y \right ) =\sum _{n=1}^{\infty }-200\,{\frac { \left ( \left ( -1 \right ) ^{n}-1 \right ) {{\rm e}^{10\,\pi \,n}}\sin \left ( 1/10\,n\pi \,x \right ) \left ( {{\rm e}^{1/10\,n\pi \,y}}- {{\rm e}^{-1/10\,n\pi \,y}} \right ) }{\pi \,n \left ( {{\rm e}^{20\,\pi \,n}}-1 \right ) } } \]