i tried to create virtual pages from a csv Data how it is shown in this Guide:
That worked well, but when i try to modify the virtual pages in the Panel, i get this Error:
SQLSTATE[HY000]  Access denied for user ‘root’@‘localhost’ (using password: NO)
Is there a way to Edit the virtual Pages in the Panel and save the changes to the CSV?
This looks like an SQL error to me? Are you sure you aren’t doing anything with SQL databases?
In addition to what @bvdputte already mentioned: The spreadsheet example is only about reading data, not writing. To actually edit data from a spreadsheet in the Panel and update the spreadsheet, you would need a library that can write to spreadsheets.
Have you tried to mix the examples or are you actually reading from a database?