Hello, I'm Greg, here to help you with this.
Try these fixes for the error:
https://learn.microsoft.com/en-us/answers/quest...
https://powerusers.microsoft.com/t5/Building-Fl...
https://www.telerik.com/blogs/what-is-json-how-...
https://powerusers.microsoft.com/t5/Using-Conne...
https://answers.microsoft.com/en-us/msoffice/fo...
If none of these help then because Lists is normally and overwhelmingly used by organizations, I would ask this at our sister forums for IT Professionals, Q&A forums here: https://docs.microsoft.com/en-US/answers/index.... ?
Microsoft Community is strictly an end-consumer forum. Solutions we give here may conflict with the organization''s Group Policy which we do not use in consumer forums at all. In this case even if you don't use Group Policy it's these forums that will know most about this error.
There are also equally good (and sometimes busier) 3rd party IT Pro forums here:
https://www.techrepublic.com/forums/
I hope it helps.
____________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.