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To resolve this, you can execute the following commands either as a normal Linux user or as root:
- sudo omd stop <SITENAME><mysite>
- cd /usr/share/
- sudo mv fonts fonts.bak
- sudo zypper install -f google-opensans-fonts
- sudo omd start <SITENAME><mysite>
After the Checkmk site has been restarted, the service graphs should display as expected.
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