@kleajmp said:
I reinstalled Notepad++ t
maybe it’s the change in the new version of scintilla…
try downloading the zip version of 7.6.6, which is the last version before the scintilla upgrade. unzip it into a known directory (maybe on your desktop or similar), and run notepad++ from there instead of your normal shortcut/association. If that version works, then uninstall your new installation, and install the 7.6.6 install version instead. Also, if that’s the case, let us know, because it will probably require a bug report.