计划任务-备份数据库，执行失败
面板、插件版本：v11.8.1系统版本：CentOS 7.7.1908 x86_64(Py3.7.9)
问题描述：计划任务-备份数据库，执行失败<pre data-v-a4d171aa="" class="whitespace-pre-wrap" style="box-sizing: border-box; border-width: 0px; border-style: solid; border-color: rgb(229, 231, 235); --un-rotate: 0; --un-rotate-x: 0; --un-rotate-y: 0; --un-rotate-z: 0; --un-scale-x: 1; --un-scale-y: 1; --un-scale-z: 1; --un-skew-x: 0; --un-skew-y: 0; --un-translate-x: 0; --un-translate-y: 0; --un-translate-z: 0; --un-pan-x: ; --un-pan-y: ; --un-pinch-zoom: ; --un-scroll-snap-strictness: proximity; --un-ordinal: ; --un-slashed-zero: ; --un-numeric-figure: ; --un-numeric-spacing: ; --un-numeric-fraction: ; --un-border-spacing-x: 0; --un-border-spacing-y: 0; --un-ring-offset-shadow: 0 0 rgb(0 0 0 / 0); --un-ring-shadow: 0 0 rgb(0 0 0 / 0); --un-shadow-inset: ; --un-shadow: 0 0 rgb(0 0 0 / 0); --un-ring-inset: ; --un-ring-offset-width: 0px; --un-ring-offset-color: #fff; --un-ring-width: 0px; --un-ring-color: rgb(147 197 253 / .5); --un-blur: ; --un-brightness: ; --un-contrast: ; --un-drop-shadow: ; --un-grayscale: ; --un-hue-rotate: ; --un-invert: ; --un-saturate: ; --un-sepia: ; --un-backdrop-blur: ; --un-backdrop-brightness: ; --un-backdrop-contrast: ; --un-backdrop-grayscale: ; --un-backdrop-hue-rotate: ; --un-backdrop-invert: ; --un-backdrop-opacity: ; --un-backdrop-saturate: ; --un-backdrop-sepia: ; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-feature-settings: normal; font-variation-settings: normal; white-space: pre-wrap;"><font color="#000000">SyntaxError: invalid syntax
Traceback (most recent call last):
File "/www/server/panel/script/backup.py", line 15, in <module>
import panelBackup
File "class/panelBackup.py", line 41
_DB_BACKUP_DIR: str = os.path.join(_BACKUP_DIR, "database")
^
SyntaxError: invalid syntax
Traceback (most recent call last):
File "/www/server/panel/script/backup.py", line 15, in <module>
import panelBackup
File "class/panelBackup.py", line 797
def backup_database_all(self, save, echo_id: str):
^
SyntaxError: invalid syntax
Traceback (most recent call last):
File "/www/server/panel/script/backup.py", line 15, in <module>
import panelBackup
File "class/panelBackup.py", line 178
if disk = disk
^
SyntaxError: invalid syntax</font></pre>
相关截图（日志、错误）：
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