Hello.
The problem has been solved. The script of the installation page is incorrect.
[Unit]
Description=INDI Web Manager
After=multi-user.target
[Service]
Type=idle
User=pi
ExecStart=/usr/bin/python /home/pi/servermanager/drivermanager.py
ExecStart=/usr/bin/python /home/pi/servermanager/autostart.py
[Install]
WantedBy=multi-user.target
The correct script is as follows:
[Unit]
Description=INDI Web Manager
After=multi-user.target
[Service]
Type=idle
User=pi
ExecStart=/usr/bin/python /home/pi/servermanager/drivermanager.py
ExecStart=/usr/bin/python /home/pi/servermanager/autostart.py
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
It works perfectly.