NDSolve[{(
2 \[Pi] \[Epsilon] Cos[
π ϵ 2Cos[2 \[Pi]π x] Sech[\[Kappa]Sech[κ + \[Epsilon] \[Kappa] Sin[
ϵ κ 2Sin[2 \[Pi]π x]]^2 (2 \[Kappa]κ +
2 \[Epsilon]ϵ \[Kappa]κ Sin[2 \[Pi]π x] -
Sinh[2 \[Kappa]κ (1 + \[Epsilon] Sin[
ϵ 2Sin[2 \[Pi]π x])]))/(\[Kappa]κ (1 + \[Epsilon] Sin[
ϵ 2Sin[2 \[Pi]π x])^2) +
4 \[Pi] \[Epsilon] Cos[
4 π ϵ 2Cos[2 \[Pi]π x] (1 + \[Epsilon]ϵ Sin[2 \[Pi]π x])^2 Derivative[1][p][Derivative[1][p][x] +
x] + 2/3 (1 + \[Epsilon]ϵ Sin[2 \[Pi]π x])^3 (p^\[Prime]\[Prime]p'')[
x][x] == 0,
p[0] == 0, p[1] == 0}, p, x,
Method -> {"Shooting",
"StartingInitialConditions" -> {p[0] == 0, p'[0] == 1}}]
On running this code, the error getting displayed is:NDSolve::ndnum: Encountered non-numerical value for a derivative at x == 0.
NDSolve::ndnum: Encountered non-numerical value for a derivative at x == 0.