Created attachment 110550 [details] E: bug I cant open videos in partition E:
Did you try to type a backslash or a slash in the field "Nome" as shown in your attachment ? I think it is a bug also. Perhaps a workaround if it runs...
This happens when Kdenlive and the clips are on the same drive. Workaround: Import clip via drag/drop.
*** Bug 405821 has been marked as a duplicate of this bug. ***
A lot changed since version 17.12n, especially the timeline got a complete rewrite and it is likely that this has been fixed. Feel free to reopen this bug or create a new report if this is still happening with the latest version (https://kdenlive.org/en/download/)