LHC@home

I get the following error messages for all LHC tasks:
Ubuntu version: 22.04
VirtualBox version: 7.1.10
Own virtual machines are working.
I did not find any useful comments for this error code. Any hints?

<core_client_version>7.18.1</core_client_version>
<![CDATA[
<message>
process exited with code 1 (0x1, -255)</message>
<stderr_txt>
2025-06-25 11:40:52 (106736): vboxwrapper version 26210
2025-06-25 11:40:52 (106736): BOINC client version: 7.18.1
2025-06-25 11:40:57 (106736): Error in guest additions for VM: -182
Command:
VBoxManage -q list systemproperties
Output:
VBoxManage: error: Failed to create the VirtualBox object!
VBoxManage: error: Code NS_ERROR_SOCKET_FAIL (0xC1F30200) - IPC daemon socket error (extended info not available)
VBoxManage: error: Most likely, the VirtualBox COM server is not running or failed to start.

2025-06-25 11:40:57 (106736): Detected: VirtualBox VboxManage Interface (Version: 7.1.10)
2025-06-25 11:41:03 (106736): Error in host info for VM: -182
Command:
VBoxManage -q list hostinfo
Output:
VBoxManage: error: Failed to create the VirtualBox object!
VBoxManage: error: Code NS_ERROR_SOCKET_FAIL (0xC1F30200) - IPC daemon socket error (extended info not available)
VBoxManage: error: Most likely, the VirtualBox COM server is not running or failed to start.

2025-06-25 11:41:03 (106736): WARNING: Communication with VM Hypervisor failed.
2025-06-25 11:41:03 (106736): ERROR: VBoxManage list hostinfo failed
2025-06-25 11:41:03 (106736): called boinc_finish(1)

</stderr_txt>
]]>

The account running BOINC must be a member of the group "vboxusers" and the BOINC service must have write permissions to "/tmp" to establish the required communication socket.
The latter is enabled in the systemd unit file.

Your BOINC client 7.18.1 may have installed an outdated systemd unit file.
To check this run the following command:
systemctl --no-pager show boinc-client |grep -i ReadWritePaths

If " -/tmp" is missing in the output you need to add it to the ReadWritePaths.
Best would be to update BOINC to the most recent version.