CVXPY
Maximize
  Sum(x, None, False)
Subject To
 22: exp(x) <= 1.0
Bounds
 x free
End
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AFTER COMPILATION
Either candidate conic solvers (['GUROBI']) do not support the cones output by the problem (ExpCone, NonNeg), or there are not enough constraints in the problem.
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GUROBI
Maximize
  x[0] + x[1]
Subject To
 22[0]: exp_1[0] <= 1
 22[1]: exp_1[1] <= 1
Bounds
 x[0] free
 x[1] free
 exp_1[0] free
 exp_1[1] free
General Constraints
\ exp_1[0] = exp(x[0])
 GC0: exp_1[0] = NL : ( EXP , -1 , -1 ) ( VARIABLE , x[0] , 0 )
\ exp_1[1] = exp(x[1])
 GC1: exp_1[1] = NL : ( EXP , -1 , -1 ) ( VARIABLE , x[1] , 0 )
End