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  1. Install the latest version of the Isabel Security Components. Available here: Isabel - Download area.
  2. Restart your computer.
  3. Try again.
 

(*) If you cannot install the latest Isabel Security Components immediately, you can use Firefox  to continue working in Isabel 6

  
  
  1. Make sure that there are no other card readers connected (other than the Isabel card reader).
  2. Verify whether you have a stable connection (the connection may have been interrupted during signing).
  3. Test with another Isabel card reader if one is available.
  4. Check time and date configuration, follow these instructions.