When I try to import website I am getting this error.
Error during temporary files creation. Original exception: Illegal characters in path
Thanks Brenden, the issue was solved. I unzipped the file and tried to import it, it worked.
When you're importing a site is it to the same version or Kentico?
If the error is related to temp files, those are typically stored/unzipped in the App_Data directory. I'd check the server/computer or IIS event logs for more details.
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