You've redacted enough information in your pictures to make it difficult for us to help. Mind you, I understand why you don't want to post your domain but if you really can't resolve this by following fox's instructions then maybe private message someone here with more details.
You can short-circuit the check by adding this to your
But I would like to stress that I really do not recommend this as the sanity checks are there to alert you to issues and bypassing them is not a long-term solution.
e: Actually, re-reading your original post, I think I'm going to agree that the self URL constant is not actually defined properly. Look at the URL in your browser's address bar when you visit TT-RSS and then compare that to the setting in the config file.