When you say you can’t open the CSV file, what do you mean ?
You need to be within SketchUp, then run the ‘Cloud’ extension [follow the instructions in its thread at SCF], choose the file and adjust the settings to match the CSV’s set up…
It should then add a mesh based on that file’s data…
If the CSV file is not to large or confidential you could upload it here so we could look at it…
You might need to ZIP it f change it to a TXT file to allow easy attachment, if a cloud-based ‘drop-box’ repository is not accessible to you…