Typically the reason for this error is that your link does not correspond to the service you would like to order.
For example, you inserted a link to the video but not to the channel when ordering subscribers. Or you selected the wrong social network on the widget. Or If you want to increase YouTube views, your video should be unrestricted and public.
In case these requirements are not met, your link could be marked as “Invalid”.
So, please check all requirements in the service description.
If your particular case doesn’t fit any description above, please get in touch with us via live chat.