Sync fail Deepin linux

Hi, Button Sync not action press.
I create /config/joplin/flags.txt
But not write log.

Can you elaborate ?
Which version ?
Which cloud storage service?
What errors occur?

Hi,
Elaborate:
log.txt
“Scheduling sync operation…”
2018-05-25 19:19:08: “Doing scheduled sync”
2018-05-26 14:33:29: “Profile directory: /home/malkut/.config/joplin-desktop”
2018-05-26 14:33:29: “Scheduling sync operation…”
2018-05-26 14:33:32: “Doing scheduled sync”

Version:
Joplin for Desktop
Joplin 0.10.25 (prod, linux)

Storage:
DropBox

Errors:
Press button “sync” not action.
I could not configure DropBox.