WordPress 4.0 Compatibility

it is compliant, …

I do not why WP generates some times errors on activation.

Reactivate the plugin a couple of time : should work at the end

I have tried reactivating the plugin 5 times now .. still the same message.

This is strange as it works on my dev / prod server…

It does not says which 1029 characters of unexpected output is displayed ?

No worries, I am going to find out why this is occurring, by following:

https://thehungrycoder.com/wordpress/how-i-have-solved-the-the-plugin-generated-xxxx-characters-of-unexpected-output-during-activation-problem.html

Let me get back to you.

Any news ?

Been out of town on business, but plan to look at this in my upcoming holiday vacation.

It would be very helpful if you manage to do that !!

Thanks

Dear mkormendy,

Have you manage to do it ?
Please believe that I will do my best to help you in any matter.