I do have an issue with reactions. I had 1 custom reaction using the builder in the theme. But now all posts have this error message and the back end has this error.

By the way, I'm running into this problem even with a new created default theme.

This should be fixed now.

 

This should be fixed now.

Something similar occurs for me on 5.0.4 upgrade. Any help would be awesome.

It's basically breaking our whole site so i reverted.

If you do so again, please let us know so we can take a look in a new topic. Your error is not related in any way to the same one as in this topic

 

It's basically breaking our whole site so i reverted.

For future reference, whenever you run into issues, it would be best imo to check the server error log too and disable all third party stuff to either rule them out as being the culprit or identifying one of them as causing the issue.

Hello, I'm still not able to upload custom reactions.

 

Hello, I'm still not able to upload custom reactions.

What message are you getting when you try this?