Parameter value is invalid

[Hyseco]

Hello,
I recently found SwiftFM and it's great. I have a problem with the getrecords function with a "Parameter value is invalid" message when accessing the function. I tried in Postman and the URL is working great. So I then checked the function you use and there seems to be a problem when converting sortJson and portalJson to JSON. When using the sortJSON and portalJSON value in the url it's working great.

Does someone get the same error as I do?

Thanks a lot!
Damien