Hi @Daniel Kaliel,
Is there another log that may provide more insight?
1, Have you checked the SMSTS.log? Please upload it for our reference. Besides, please upload a task sequence for our reference.
2, Have you added any restart step in the task sequence? If so, please do not forget select “The currently installed default operating system”. The screenshot for your reference:
These are two similar threaders for your reference:
Install Software with TS - The operating system reported error 50 (microsoft.com)
http://robotarchive.blogspot.com/2014/04/install-software-with-ts-operating.html
Note: Microsoft provides third-party contact information to help you understand the problem. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Looking forward to your reply.
Best regards,
Cherry