# How to solve this differential equation? Error (NSolve :: ifun)

When I solve the differential equation I get an error:

error: Solve::ifun: Inverse functions are being used by Solve, so some solutions may not be found; use Reduce for complete solution information.

code of the differential equation:

DSolve[{(H'[x])^2 - ((1 + 6 H[x]^2)^2 H[x]^2)/(
6 (1 + 18 H[x]^2)) + ((1 + 6 H[x]^2)^2 E^-x)/(
18 (1 + 18 H[x]^2)) == 0, H[0] == 10^(1)}, H, x] // FullSimplify


Thanks.

 NDSolve[{(H'[x])^2 - ((1 + 6 H[x]^2)^2 H[x]^2)/(6 (1 +18 H[x]^2)) +