Can't access gui

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i updated to the newest version of pihole, im also running nut , i never had a problem before the update, when it updated it asked me something about the webserver i dont remember.
but what happens is , if i reboot it everything works fine for a week or 2 , then all of a sudden the pi-hole web gui stops working.. i have to restart the pi.

Expected Behaviour:
should be able to access gui

Actual Behaviour:
every week or 2 the web gui becomes inaccessible.

Debug Token:
https://tricorder.pi-hole.net/ovkGrSjw/