When I click an imported object (suite) in the library, this one appears in green in the right screen (see file Ecran vert) and I can thus visualize nothing.
When I click a sequence of the project, this one appears in black in the right screen (see file Ecran noir) and I can thus visualize nothing.
Everything worked correctly at the beginning, I was able to make projects, then the previous problems appeared suddenly]

To: claude.monteilh@hotmail.com

Reinstall the program following the instructions.
Do you have that issue on preview of trimming option or color correction
Right click on the deskop>>properties>>settings>>color quality (try changing the value)