Argument #1 ($array) must be of type array, string given block_class/src/Service/BlockClassHelperService.php

I created a patch based on the work done in the following MR:

https://git.drupalcode.org/project/block_class/-/merge_requests/58

After applying these changes, it works for my on 4.0.0.

I encountered the same error and have created a patch that could be helpful.

Facing the same issue.
Patch #6 is working
Thank you :)

Thanks everyone!

Adding this on plan for the next release

Patch installed and working for me!

Thank you very much for raising this issue.

Sorry for this late reply, but unfortunately I was unable to reproduce this with current version of Drupal Core, tested with:

• core: 11.2.5
• block_class: 4.0.x
• php: 8.3

Is this still issue still happening with more recent versions of the module and Drupal Core?

From what I have seen, the config variable 'block_classes_stored' is properly declared as a sequence of string and initialized as an empty array, so I can't seem to think of any reason the variable $block_classes_stored could be a string...🤔

In short: I am unable to reproduce this issue and from the look at the code think the problem should not occur again.

Could anyone please provide clear testing steps to follow, to reproduce the issue, if possible with more context, versions of module/core, etc... ?

Any additional information that could help us reproduce the problem would be greatly appreciated.

Additionally, since there has not been any comments on the issue for half a year, we could also perhaps assume the problem initially reported might have been resolved with some other changes (from other tickets) (?).

Lowering ticket priority back to Normal and switching status to Postponed (maintainer needs more info), for now, until the work expected in this ticket could be clarified.

Feel free to let us know if you would have any questions or concerns on any aspects of this comment or the module in general, we would surely be glad to help.
Thanks in advance!

Facing the same issue with TB Megamenu blocks (https://www.drupal.org/project/tb_megamenu) - after some debug I've found that the conversion is not straigthforward, so I added a check to decode the JSON string into an associative array.

Hi
I have added a new MR handle Json and check if empty block_classes_stored.

Best Regards
Khalil

You can find the patch here