Question: How do I solve a differential equation numerically?

Dear all, I had a challenge of using maple to obtain numerical solution of a volterra-integral equation using the method of reproducing kernel space, however I converted the integral equation to an ode and try to solve it numerically but obtatined an error message. Please how do I overcome it? the problem is as follows:

dsn := dsolve({diff(u(x), x) = e^x*ln(e)+(2/9)*e^3-1/9+int(y*u(y)^3, y = 0 .. 1), u(0) = 1}, numeric)

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