This troubleshooting applies to installations with ODBC Driver version 10. The latest versions of Mi-Token reporting portal (as of 2020) use ODBC Driver 11, see the article Unable to download reports - Connection is busy with results for another command for more information.
Validate if you are using ODBC Driver version 10 by opening the Windows Start menu and typing "ODBC". Select ODBC Data Sources (64-bit) from the list of options:
Once in the ODBC Data Source Administrator window, click on the System DSN tab, look for the entry with the name "Mi-Token". The driver version is located below the Driver column as shown in the picture below.
Add new string value to HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBC.INI\Mi-Token registry key:
Value Name: MARS_Connection
Value data: Yes