System.Net.WebException when getting license on startup of Rhino

Hello Forum,
When I try to start Rhino7, I get the following exception and cannot get a license. How can I solve this problem?

Error converting value “System.Net.WebException, System.Net.Requests, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a” to type ‘System.Type’. Path ‘Lease Tokens.59ff75c9-9c71-4ef8-a290-6b590f3fc63a.LastUpdateExceptionInfo.InnerExceptionInfo.InnerExceptionInfo.Type’,
line 1, position 3510.

license getting error

The same screen appears repeatedly even after Retry.
If I Cancel, the program terminates without obtaining a license as shown below.

not found

Hi -

Which version of Rhino 7 are you trying to run?
I don’t see a license for Rhino 7 in your Rhino Account…

Thanks for the reply.

Which version of Rhino7 are you trying to run?

The version I use is 7.20.22193.9001.

I don’t see a license for Rhino 7 in your Rhino Account…

How did you verify my Rhino account? If you verified it with the email address registered in this forum, it was old and I changed it to the same one as your Rhino account.

I solved this problem by deleting the following folder.