[Bug]: Subject: Bug Report – KeyError in Lizmap Plugin 4.5.3+ (server_lwc.py – line 979)

[geoartkoszalin]

What is the bug?

Hello,

I would like to report a bug that occurs when using the Lizmap plugin version 4.5.3 and later in QGIS 3.40.4 (Bratislava) with Python 3.12.9 on Windows.

Error details:

While working with the plugin, the following Python error is triggered:

KeyError: 'wersja'
Traceback (most recent call last):
...
File "server_lwc.py", line 979, in _messages_for_version
messages.append(tr('Version {version} not maintained anymore, only for security bugfix only').format(version=branch))
KeyError: 'wersja'

Probable cause:

The error seems to be caused by a mismatch between the placeholder in the original English string ({version}) and its Polish translation ({wersja}), when using .format().

As a result, the .format(version=branch) call fails because the translated string expects a key called {wersja}, which does not exist in the .format() call.

Suggested solutions:

Ensure that the translation keeps the {version} placeholder unchanged, even in translated languages.

Or update the .format() call to match the translated key:
format(wersja=branch) if the translation uses {wersja}.

Using f-strings instead of .format() would also prevent this issue in multilingual environments.

System information:

QGIS version: 3.40.4 (Bratislava)

Lizmap plugin version: 4.5.3 and following

Python version: 3.12.9 (64-bit)

Operating System: Windows

Language setting: Polish

Please let me know if I can provide any additional information, logs, or help with reproducing the issue.

Versions, safeguards, checks summary etc

Best regards,
Artur Studziński

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