Invalid URI: The format of the URI could not be determined when accessing external DLL in .net core 2.2 application

Dear All,

   I've two applications, one of the application build version under 4.5.2 which supports Dynamics CRM 2016 SDKs. another one project which I'm currently building under .NET CORE 2.2 version which does not support CRM SDK. So, I'm referencing 4.5.2 application dll into .net core 2.2 application. Once, I completed all the mappings and referencing models, the following error occured when debugging the application in local machine. 

{System.UriFormatException: Invalid URI: The format of the URI could not be determined.

And the above error referencing my local above mentioned two application URLs.

Please help me, I'm stuck in this issue. 

Awaiting your reply.

Thanks,