HAProxy Stats page is not displayed correctly

Hi all,
I just installed 02 new HAProxy server. The stats page of these two haproxy servers is showing the wrong form. Like the photo below.
I tried to update to version 2.7 or downgrade to version 2.5. However the problem is not resolved.
I tried updating another normal server to 2.7, and the stats page worked fine.
Maybe I installed something missing. Please help me deal with this problem.