Numbers became unreadable code, how to fix it

numbers transformed into unreadable code in the scrivener. For instance, “123456789” come out as “〈〉《》「」『』【”, respectively.

How to fix this problem?

Do you accidentally change the font to a Dingbats Font, like Wingdings or Webdings? Try changing the font to Times New Roman or Arial to see if the numbers return.