litehtml/src/3rdparty/litehtml/src/css_parser.cpp:136:89:
    error: specialization of 'litehtml::css_token_vector ...
--- a/src/assistant/qlitehtml/src/CMakeLists.txt
+++ b/src/assistant/qlitehtml/src/CMakeLists.txt
@@ -37,6 +37,7 @@
       litehtml
       PROPERTIES
         QT_COMPILE_OPTIONS_DISABLE_WARNINGS ON
+        UNITY_BUILD OFF
     )
     set_target_properties(
       gumbo