The documentation (behind button '?' of Cppcheck report XMLs) states that the filename must be '*/cppcheck-result-.xml' but on your website you only use 'cppcheck.xml'.

Also it looks like 'cppcheck-result.xml' will no longer work with 1.23 when the line for 'Cppcheck report XMLs' will be left empty (a nullptr exception is thrown then). This worked fine with 1.21.