Hi @GOOD LIFE, thanks for bringing this to our attention.
This sounds like the error message stated, the full file path, including the file name, is too long now for Excel to be able to open the file.
This means from the C:\ all the way to the extension of a file, in this case xlsx.
I'd recommend checking this by right clicking the file and viewing the properties to get the full file path.
This will help me to assist further!