Error: Invalid character: 兒

• /srv/code/openfun.app/lawtrace/libraries/LyTcToolkit.php:94
• /srv/code/openfun.app/lawtrace/libraries/LyTcToolkit.php:19
• /srv/code/openfun.app/lawtrace/libraries/LawHistoryHelper.php:447
• :
• /srv/code/openfun.app/lawtrace/libraries/LawHistoryHelper.php:438
• /srv/code/openfun.app/lawtrace/libraries/LawHistoryHelper.php:229
• /srv/code/openfun.app/lawtrace/libraries/LawHistoryHelper.php:16
• /srv/code/openfun.app/lawtrace/controllers/LawController.php:104
• /srv/code/openfun.app/lawtrace/mini-engine.php:285
• /srv/code/openfun.app/lawtrace/mini-engine.php:249
• /srv/code/openfun.app/lawtrace/index.php:4