Hi Nicolai,

Thanks for your message.
A white screen probably means you have a fatal error on your website. It is strange that WP_debug won’t give you that information, but if it is a 500 error, I expect there should be something about this error in your error log. Can you try to find this information and send it to support@admincolumns.com so we can analyse the cause of the issue?

So if I understand you correctly, you already have the issue on the dashboard and not only on the edit pages? If that is the case, then it is probably not related to the columns itself but something else in our code. We need some more information to be able to help you with this issue.

Hi Nicolai,

Thanks for the input.
The specific error indicated that the file is loaded twice or that your specific column code is in multiple files defined. Make sure that your code is not defined multiple times in your codebase and that the file is loaded just once. You can use the require_once() function to make sure of that.

I did have a look at your code and it looks ok. I was also able to load the columns. I do have some suggestions though.

1) When you extend our columns, make sure you use our new name spaced classes (I changed it in the file below)
2) You can check more specifically for a WooCommerce overview. Your columns are now loaded for every WooCommerce overview page

You can find some changed/suggestions for these points in the codeshare below
https://codeshare.io/507Z9N

Hi Nicolai,

I’m not sure what could cause the problem at this moment.
Did you try to add your code to a separate plugin to isolate the issue?
I pasted your code to a new plugin and everything seems to be working fine.

Stefan

Hi Nicolai,

It should not make a difference.
When you remove the code from your theme, is the column still available? If so, then it is loaded somewhere else in your code.

I’ve added a specific check example for WooCommerce Orders in the codeshare I send you before.
You could try to add this to your code, but I also expect that this should not make any difference.

Hi Nicolai,

No I don’t believe that specific issue is not related to this issue.
Your column runs on the WooCommerce pages, so that has nothing to do with the Taxonomy overview page.
Besides that, for some reason, your columns are loaded multiple times which means there is a trigger or something else in the code that’s loading your file twice.

Another approach that could solve your problem is to put your class files in separate files and make sure those files are loaded once. Or you could write an autoloader, that could also prevent you from loading the class multiple times. You could even wrap it in a specific check if the class already exists. If not, you load the file, otherwise, it is already loaded apparently.