[tde-users] Fonts

/I'm hoping this isn't related to my removal of 600Mb worth of Noto fonts that were all foreign language characters.../ I was just in a newsgroup with Thunderbird, when an Alert box appeared. No text appeared in the alert box, so at first, I did not know what the alert was. I then went into SeaMonkey into the same newsgroup and an Alert box appeared with text, indicating what the problem was. Is the lack of a font in the Thunderbird Alert box (attached), a TDE setting perhaps? Thanks in advance. -- Linux. A Continual Learning Experience. TDE: R14.0.10 - Debian: 10.10 (amd64)