several plugins - Upgrade to 22.1 breaks "Log File" view in WebUI

[Starkstromkonsument]

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Describe the bug
Upgrading to OPNsense 22.1 breaks the Log File views in the WebUI of several plugins. The WebUI only displays "No results found!".

List of affected plugins (might not be complete, as I don't use all available plugins):

• C-ICAP
• ClamAV
• QEMU Guest Agent
• Zabbix Agent
• Zabbix Proxy
• Web Proxy

To Reproduce
Steps to reproduce the behavior:

1. Upgrade OPNsense to version 22.1
2. Go to Services --> [Plugin XYZ] --> Log File
3. Set severity filter to Debug
4. See error: No results found!

Expected behavior
Display the contents of the corresponding log file.

Screenshots

Relevant log files
See above.

Environment
OPNsense 22.1-amd64
FreeBSD 13.0-STABLE
OpenSSL 1.1.1m 14 Dec 2021
Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz (4 cores, 4 threads)

[jkellerer]

This is caused by the severities filter in combination with a generic log file format that is not directly supported in the built-in log viewer (part of core and reused by many plugins). As a temporary workaround one can unselect all severities (enable "Multiselect" in drop down and unselect all).

See also: #2776 (comment)