Could not load file or assembly 'Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies

Dear SDL Devs, dear Community,

we are still using the file based API. On Studio 2019 we get the following error, using Sdl.LanguagePlatform.TranslationMemoryApi:

Could not load file or assembly 'Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. HRESULT: 0x80131040: The located assembly's manifest definition does not match the assembly reference

We never used JSON nor Newtonsoft.Json. Inspecting the Studio installation folder, one can find a dll file with the same name, but it's in version 11.0.2. Does the API still reference an old version of the dll? And is it possible to fix it without a hassle?

Unfortunately we can't use 

public ReadOnlyCollection<ServerBasedTranslationMemory> GetTranslationMemories(TranslationMemoryProperties additionalProperties);

anymore, at least the problem occurs trying to refresh Translation Memories.

Best Regards,

Hendrik