VAF problem with dll

Hello,

I created a VAF. I also use a TaskQueue, i.e. dll MFiles.VAF.Extensions. NET. Framework 4.7.2.

It works for me and my colleague, the customer has the error:

Could not load type 'MFilesAPI.Deserializer' from assembly 'Interop.MFilesAPI, Version=7.0.0.0, Culture=neutral, PublicKeyToken=f1b4733f444f7ad0'. (0x80131522)

NET Framework is correct.

Please, what is missing? Thank you.