A translator has completed the translation but now they are unable to generate the target file.

The error message is as follows:

[FAILED] Exception of type 'System.OutOfMemoryException' was thrown.

1. Remove all images/videos from the source document before importing it into MultiTrans for translation. This can greatly reduce the size of the XLIFF file. See the following article for advice on how to do this in Word documents (DOCX) and PowerPoint files (PPTX):
How to remove media from large DOCX and PPTX files during translation

2. Close any other running programs that you don't currently need.

3. Alternatively, try to export the target document via an "Export from XLIFF" Flow Machine Task, if you have access to MultiTrans Flow:

The file is too large and the XLIFF Editor does not have enough available memory to process it.

Related issue:
MultiTrans - Unable to open XLIFF file in the XLIFF Editor - "System.OutOfMemoryException'"