Unable to open Trados Studio 2021 after the latest update

Hello everyone,

Yesterday evening, I saw that there was a new update and decided - unwisely - to go forward with it. It seemed to proceed along normally but when I tried to open Studio 2021 again, here is the message I received:

Could not load file or assembly 'SimpleInjector, Version=4.9.0.0, Culture=neutral, PublicKeyToken=984cb50dea722e99' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

I realized yesterday evening that SDL technical support is not available on weekends. And I need Trados to work. I had just wrapped up a translation that I need to send in before Monday morning. I just needed to do a final read through before finalizing it and sending it. So this could not come at a worse moment for me.

Can anyone please help me sort this out?

Thank you ever so much!

Anne