affected file: chrome\content\sogo-connector\general\sync.addressbook.groupdav.js

            let syncError = false;
            if (this.webdavSyncToken.length
                && jsonResponse["error"] && jsonResponse["error"].length) {
                let davError = jsonResponse["error"][0];
                if (davError["valid-sync-token"].length) {

Redeclaration let syncError = true;
}
}