Some of the scheduled Health Check Report PDF files have missing names of days in the x-axis of the graphs. It happens intermittently on the same schedule report.
Edit the scheduled report and set the granularity to "Raw".
To correctly represent a non-English character set in a report, a specific TrueType font containing the character set must be available to both the server generating the report and the client viewing the report. If the correct font is not available to the server, you may see the following warning in the log: "Warning: expecting single-byte character, found multi-byte character)".
The server expects fonts used for reporting to be in one the following directories:
The server looks for the following fonts when these character sets are used:
|Chinese (U+4e00 to U+9fcf, U+3400 to U+4dbf)||SimSun, MS Gothic|
|Japanese (U+3040 to U+309f, U+30a0 to U+30ff)||MSGothic, MS PGothic|
|Korean (U+ac00 to U+d7af, U+1100 to U+11ff)||Dotum, Batang|