@Pencho Trifonov Thanks for posting in our Q&A.
For this issue, I try to change the URL in "Configure the Enterprise Mode Site List", but it shows as same as yours. It seems a known issue. The temporary fix is to configure this setting to be "Not configured" and save it, then set it to "Enabled" and reconfigure the URL.
Given this situation, it is better to open an online ticket to double confirm and find if there is more effective help. It is free. Here is the online support link:
https://learn.microsoft.com/en-us/mem/intune/fundamentals/get-support
At the same time, I will try my best to feedback.
Thanks for understanding.
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