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White spaces won't dissapear in the editor of Trados 2017, despite pressing the toggle button

Hello,

Recently I have reinstalled Trados 2017 on a new Windows 10 computer and when I was translating yesterday, I activated the white spaces in the "Home" tab, but when I pressed the toggle button to de-activate them, they didn't disappear (they only disappeared in the translation memory window).
When I created the project again in the hope that the problem would be fixed, the white spaces wouldn't in turn appear.

Do you know how to solve this problem?

Best regards,