I can’t see any of the screenshots because for me those throw an Error 410 if I try to load them on a new tab. Can you please upload them on services like Imgur and share the direct link of the image on the message, or use the upload tool on the tools present on Discourse (if you don’t know where it is, check this) to upload them directly?
You will need to add the domain on the “Addon Domains” section of the Control Panel of a hosting account here on InfinityFree, or remove and re-add it if it was already added before, so that your domain would work fine. If that doesn’t let you add your domain or access the Control Panel, it’s probable that your account was suspended for abuse and you need to send a support ticket in order to get it activated again.