Update out of SDL Trados Studio to 2021 SR2 Lost connection to licencese server. How to fix it?

Hi there;

after installing an Update out of the software (SDL Trados 2021 to 2021 SR2), I receive the following error code.
      <ErrorCode>1</ErrorCode>
      <ProviderErrorCode>210005</ProviderErrorCode>
      <ErrorMessage>Could not connect to license server.</ErrorMessage>

As I cannot restart the programm how can I re-establish the connection to the licence server?

Anyone an idea how to resolve it?

Thank you very much
     Daniel

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