Don't limit error message length

I've created a merge request for this.
Given the simplicity of the change, I don't think this has any impact on backwards compatibility.

@nick dewitte,

Steps to Reproduce and Test the Fix
Installed the module on Drupal 11.2.2.
Replicated the issue where the error message is restricted to 128 characters.
Applied the patch from Merge Request !35.

Re-tested by adding an error message longer than 128 characters. and its working fine.

Thanks.