The debugger only shows a single grey square when examining variables.
svn build rev 12458 (2021-05-27 16:12:21) gcc 8.1.0 Windows/unicode - 64 bit
Name : Code::Blocks
Version : svn-r12458
SDK Version : 2.9.0
Scintilla Version : 3.7.5
Author : The Code::Blocks Team
E-mail : info@codeblocks.org
Website : http://www.codeblocks.org
OS : Windows 10 (build 18363), 64-bit edition
Scaling factor : 1.000000
Detected scaling factor : 1.000000
Display PPI : 120x120
Display count : 1
Display 0 (\\.\DISPLAY1): XY=[0,0]; Size=[1920,1080]; Primary
wxWidgets Library (wxMSW port)
Version 3.1.5 (Unicode: wchar_t, debug level: 1),
compiled at Apr 25 2021 09:56:34
Runtime version of toolkit used is 10.0.