Edit opening empty text

Hello :slightly_smiling_face:,
When I want to modify an existing file with any editor, especially Gédit, the file opens, but the text written in it is not visible. Moreover, my cursor is placed very low in the window.
Here is an example of a photo. Would you please have an idea of the

Text editor

The link to the photo or screenshot doesn’t seem to work.

If you open a terminal, what is the output of the file command

file your_file

?