When using the Block_ajax module in conjunction with the Kiso theme, there's an incompatibility issue where the block fails to load due to the block ID passed in the variables being in the format block_content: instead of the expected block configuration ID. This occurs because Kiso attempts to load the block during hook_preprocess_block() and theme_suggestions_block_alter() to determine the block region to create some theme suggestions.
We should add the $block_id value in $configuration['id'] key before we call the instruction $blockInstance = $this->blockViewBuilder->build($plugin_id, $configuration, TRUE); in the loadBlock() method of AjaxBlockController.
Active
3.0
Code
This issue was based on Kiso theme but this will affect any theme with a preprocess block that tries to do a Block::load().
As mentioned in the issue description, if we don't pass the $block_id to the $configuration argument, then Block::load() will be done on the plugin id.
I'm proposing a simple patch.
Tests missing