Wget connection refused error for Tvheadend url grabber

I’m running Tvheadend 4.2.8-36 in CoreELEC 19.3 on a Ugoos X3 Amlogic box.
I run the tv_grab_url and zap2epg grabbers 3 times a day.
Things will run fine for a couple of days and then I get the following error for tv_grab_url:

2021-12-02 00:15:52.084 [ INFO] spawn: Executing "/storage/.kodi/addons/service.tvheadend42/bin/tv_grab_url"
2021-12-02 00:15:52.150 [ ERROR] spawn: wget: can't connect to remote host ( Connection refused
2021-12-02 00:15:52.153 [ ERROR] xmltv: /storage/.kodi/addons/service.tvheadend42/bin/tv_grab_url: no output detected
2021-12-02 00:15:52.153 [WARNING] xmltv: /storage/.kodi/addons/service.tvheadend42/bin/tv_grab_url: grab returned no data is the address of the box that runs Tvheadend. The zap2epb grabber still runs fine and doesn’t get the connection refused error. If I reboot the box I’m good for another couple of days.

I’ve also noticed that the grabbers appear to run twice for some reason. I don’t know if this is related. I’ve got the cron set to:

5 0 * * *
5 8 * * *
5 16 * * *

I posted this problem on the Tvheadend forum and was told to “Allow host to “without credentials” user “*” with same password.” However, I have no clue where to do that nor why the credentials expire after a couple of days.

Any help would be appreciated.

I’ve attached a complete Tvheadend service.log file for reference.
service.log (2.8 MB)

Edit: I initially posted this in the Tvheadend subcategory but didn’t get any responses so I moved it here.

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