Log meaningful error messages if profile_schemas are missing

[hikinggrass]

OCPP Version

OCPP1.6

Describe the problem

At the moment when the profile_schemas are not found a cryptic error message is logged:

Dynamic exception type: nlohmann::json_abi_v3_11_2::detail::parse_error
std::exception::what: [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal

Describe your solution

Log a meaningful message stating that the required schema wasn't found at the expected location

Additional context

No response