Display Progress plugin installs but HD44780 20x4 lcd not showing anything(line 1 and 3 display rectangles.
ran test.py script and the display works correclty. the constrast of the display is set correctly.
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OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible
Octoprint 1.8.6, OctoPI 0.18.0, Virtual printer(will use Anycubic Vyper), browser - Google Chrome.