相关信息 (必须)
操作系统：
桌面端还是手机端：桌面
版本号：0.5.7
简单描述（必须）
Error: TypeError: Cannot read properties of null (reading ‘charAt’) at $goog$string$capitalize$$ (file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:5015:34) at $frontend$modules$file$core$transact_file_tx_if_not_exists_BANG_$$ (file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:42407:299) at $frontend$modules$file$core$save_tree$$ (file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:42443:77) at $frontend$modules$outliner$file$do_write_file_BANG_$$ (file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:44596:74) at file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:107171:15 at $switch__29647__auto__$jscomp$23$$ (file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:107086:290) at Function.$frontend$util$batch_$_state_machine__29648__auto____1$$ [as $cljs$core$IFn$_invoke$arity$1$] (file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:107096:69) at $cljs$core$async$impl$ioc_helpers$run_state_machine_wrapped$$ (file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:14304:142) at file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:14606:12 at file:///C:/Users/guo/AppData/Local/Logseq/app-0.5.7/resources/app/js/main.js:14465:142