Some of the examples with Fourier returned FFTW cannot create plan in Julia 1.7.2

[ay111]

I noticed that some examples in the documentation of ApproxFun.jl are not working in Julia 1.7.2. Some of the examples with Fourier returned FFTW cannot create plan in Julia 1.7.2. There is an example on d=Domain(-1..1)^2 but Fun(d) returned error. Generally, I think there is need to review examples in the documentation as some returned errors.