Error editing Conversations block

Using Concrete / Help
1

Concrete 8.5.4
PHP 7.2.24

I’ve got an issue when trying to edit any conversations block. Adding the block behaves normally, block itself behaves normally, but once the block is added, I can’t edit it.

Error thrown is:

implode(): Invalid arguments passed
|core_conversation/form.php(252): Whoops\Exception\ErrorException->null||
|core_conversation/form.php(252): null->implode||
|src/Block/View/BlockView.php(361): null->include||
|core_conversation/edit.php(4): Concrete\Core\Block\View\BlockView->inc||
|src/Block/View/BlockView.php(248): null->include||
|src/View/AbstractView.php(164): Concrete\Core\Block\View\BlockView->renderViewContents||
|views/dialogs/block/edit.php(33): Concrete\Core\View\AbstractView->render||
|src/View/View.php(267): null->include||
|src/View/View.php(245): Concrete\Core\View\View->renderInnerContents||

Any pointers would be greatly appreciated!

2

I would check if there are any overrides. I would also recommend taking backups and updating to the latest v8 Concrete and PHP 7.4