Table 'tabDefaultValue' missing Error When creating new site

You can try downgrading mariadb to 10.3 like others have suggested or upgrade frappe to the lastest stable on your branch, eg. 14.1 → 14.8

  cd your-bench
  cd apps/frappe
  git pull
  bench restart
  
  # if you have unneeded changes
  git add .
  git stash
  git pull