This is a windows, not a Ryzom problem, occurring after system updates. You should then reinstall 'Microsoft Visual Studio 2013 Runtime" https://support.microsoft.com/de-de/help/3179560/update-for-visua l-c-2013-and-visual-c-redistributable-package .
If you have a 64bit system, install both the 32bit and the 64bit version.
If you have a 64bit system, install both the 32bit and the 64bit version.
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