Not a bug Facing Some error when i click on any of forum link it shows errors

[SanjayS]

Affected version

2.0.12

Error when i open any forum category

An exception occurred: [Error] Unsupported operand types in internal_data/code_cache/templates/l1/s3/public/forum_view.php on line 22

1. XF\Template\Templater->{closure}() in src/XF/Template/Templater.php at line 1230
2. XF\Template\Templater->renderTemplate() in src/XF/Template/Template.php at line 24
3. XF\Template\Template->render() in src/XF/Mvc/Renderer/Html.php at line 48
4. XF\Mvc\Renderer\Html->renderView() in src/XF/Mvc/Dispatcher.php at line 332
5. XF\Mvc\Dispatcher->renderView() in src/XF/Mvc/Dispatcher.php at line 303
6. XF\Mvc\Dispatcher->render() in src/XF/Mvc/Dispatcher.php at line 44
7. XF\Mvc\Dispatcher->run() in src/XF/App.php at line 1879
8. XF\App->run() in src/XF.php at line 328
9. XF::runApp() in index.php at line 13

How to fix this please help asap

My php version was 5.6 before then error was showing "500 Internal Server error" then i switched to 7.2 now its php version is 7.2 and showing this error when i open link.