Running `fossil extras` on seemingly any repository generates this error:
fossil: SQLITE_ERROR: near ",": syntax error
fossil: near ",": syntax error
SELECT x FROM sfile WHERE x NOT GLOB ('manifest','manifest.uuid','_FOSSIL_','_FOSSIL_-journal','.fos','.fos-journal');   AND NOT 0 ORDER BY 1

Reverting the GLOB function back to IN as it was before seems to fix the issue:
-      " WHERE x NOT GLOB ('manifest','manifest.uuid','_FOSSIL_',"
+      " WHERE x NOT IN ('manifest','manifest.uuid','_FOSSIL_',"