Error access openmediavault gui

Hi,

I spend one week to configure my server on OMV5, I had a lot of problems..

For example, I had to remove the DNS setting 8.8.8.8 as specified in the technodadlife video of OMV5 installation because I was not able to add or update any pluggins on homeassistant container, and the apt update and upgrade wasn't working anymore... So I have removed the DNS settings, and it was working again.

I finally get everything working today and just before doing a clonezilla backup... Everything goes wrong... I wasn't able to access to my openmediavault GUI anymore...

After rebooting, I have obtained the following error on the interface :

1. Error #0:
2. OMV\Exception: Failed to read file '/var/cache/openmediavault/cache.omv\controlpanel\login_js.json' (size=0). in /usr/share/php/openmediavault/json/file.inc:207
3. Stack trace:
4. #0 /usr/share/php/openmediavault/json/file.inc(223): OMV\Json\File->getContents()
5. #1 /usr/share/php/openmediavault/controlpanel/controlpanelabstract.inc(198): OMV\Json\File->read()
6. #2 /var/www/openmediavault/index.php(46): OMV\ControlPanel\ControlPanelAbstract->render()
7. #3 {main}

And I don't know what to do... I search on the web, I have enough space on my disk, but I don't know why this error appears...

Is it because of DNS setting? I try to change it, but without the web interface, I don't know how to do it...

Could you help me?

Thanks

Thanks, but I have already done that and I still have the same error.

The file doesn't exist :

[cpp]root@rdhome:~# ls -ltra /var/cache/openmediavaultcache.omv\controlpanel\login_js.json

ls: impossible d'accéder à '/var/cache/openmediavaultcache.omvcontrolpanellogin_js.json': Aucun fichier ou dossier de ce type[/cpp]

I have something similar, but it is not the same file path:

I can reinstall OMV from scratch to resolve it, but I would like to understand what happened because it is not the first time that I have this error. I have it few days ago, but I needed to reinstall my system on another disk, so I haven't search for a solution.

What do you put inside the primary & secondary DNS settings on the OMV web gui ? Because the 8.8.8.8 wasen't working anymore after few hour...

Thanks

I think I have found the problem...

What is this overlay2 folder which take me so much disk space ?

.root@rdhome:/var/lib/docker# du . -h --max-depth=1

4,0K ./trust

18G ./overlay2

31M ./image

404K ./volumes

4,0K ./swarm

72K ./buildkit

4,0K ./runtimes

61M ./containers

20K ./plugins

20K ./builder

4,0K ./tmp

168K ./network

18G 

Thanks, I finally resolve the gui access. It was because of home assistant which fill all my SSD during snapshot restauration...