i cant get pixel to work. i keep getting the error message - failed to upload need to close blockers. please help

i m click blue colour allow to add list but this error shwoing invalid domain please check screen shot now

please check this screena guide how i m resolve my iussue now

I need to increase the limit of phone numbers. We have a development that requires X phone numbers for X businesses. Currently we are limited to two and we are going to find ourselves having to change "companies" and have to use third-party applications that do not have this limit.
I have also been searching for hours, if I could open a support ticket or something similar. And I haven't found anything. A disappointment.
If anyone knows how I can contact meta to better detail the case and the idea. I'm all ears.
Thank you so much.

My developer testing sandbox ad account - Sandbox Adscook AA (1101692526671104) has been blocked for more than a year and we cannot make a proper testing of our app.