Help ,new install Aria2 ,but for BT ,show could not open exsiting file

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I am a new Openwrt man ,learn install Aira2 from internet. i am use WebUI-aira2.

for BT ,it show Could not open exsiting file.

For HTTP download ,it show download was unsuccessful.

Pls give me your comment.

The log have not update and auto - fresh ,it is yesterday log ,but i don't know why it has not auto-fresh for update.

i attached the system log for your reference.

/Last 50 lines of log file:

/No log data.

/Last 50 lines of syslog:

/Wed Nov 23 00:47:19 2022 daemon.info aria2c[5363]: jail: exec-ing /usr/bin/aria2c
/Wed Nov 23 00:47:19 2022 daemon.info aria2c[5205]: jail: jail (5206) exited with exit: 15
/Wed Nov 23 00:47:18 2022 daemon.info aria2: Aria2 will run with user 'root'.
/Wed Nov 23 00:43:07 2022 daemon.info aria2c[5205]: jail: exec-ing /usr/bin/aria2c
/Wed Nov 23 00:43:07 2022 daemon.info aria2c[4990]: jail: jail (4991) exited with exit: 22
/Wed Nov 23 00:43:05 2022 daemon.info aria2: Please make sure user 'aria2' has write access to /download dir: /mnt/sda1/aria2
/Wed Nov 23 00:43:05 2022 daemon.info aria2: Aria2 will run with user 'aria2'.
/Wed Nov 23 00:24:20 2022 daemon.info aria2c[4990]: jail: exec-ing /usr/bin/aria2c
/Wed Nov 23 00:24:20 2022 daemon.info aria2c[3182]: jail: jail (3206) exited with exit: 1
/Wed Nov 23 00:24:19 2022 daemon.info aria2: Please make sure user 'aria2' has write access to /download dir: /mnt/sda1/aria2
/Wed Nov 23 00:24:19 2022 daemon.info aria2: Aria2 will run with user 'aria2'.
/Tue Nov 22 12:58:14 2022 daemon.info aria2c[3182]: jail: exec-ing /usr/bin/aria2c
/Tue Nov 22 12:58:12 2022 daemon.info aria2: Please make sure user 'aria2' has write access to /download dir: /mnt/sda1/aria2
/Tue Nov 22 12:58:12 2022 daemon.info aria2: Aria2 will run with user 'aria2'.