Possible reasons why this could have happened:
You have used wrong file type - Tridify supports IFC
It's an incorrect version of the IFC file - currently IFC 2x3 is supported
The file is corrupted
The file has wrongly formatted IFC data
The file contains non-standard IFC data
If your file receives status Validation failed, you can view details of the file to find the Validation log. In most cases, it provides an explanation for why the validation has failed.