cannot use operator[] with a string argument with string

[bleze]

• What is the issue you have?

Unable to parse valid JSON.

• Please describe the steps to reproduce the issue. Can you provide a small but working code example?

Take the first JSON example from; https://json.org/example.html

• What is the expected behavior?

That it could be parsed.
Other software, like for example; codebeautify, can parse it just fine.

• And what is the actual behavior instead?

json.exception.type_error.305: cannot use operator[] with a string argument with string

• Which compiler and operating system are you using? Is it a supported compiler?

Visual Studio 2017

• Did you use a released version of the library or the version from the develop branch?

3.7.3

[bleze]

Appears to be an error 40 instead