Module does not work after BILLmanager migration

Problem

After migrating BILLmanager to a new server, one or more of the previously installed modules has stopped working. At the same time, the modules are displayed in the web interface.

Solution

After migrating BILLmanager, some modules may need to be reinstalled because the required packages are missing on the new server. Because of this, the functionality of the modules is disrupted, even if they are displayed in the web interface.

To reinstall the required modules on the new server:

Connect to the server with the platform via SSH. For more information about connecting via SSH, see Workstation setup.
Run the command:
```
/usr/local/mgr5/sbin/mgrctl -m billmgr fix.modules
```
The command will automatically restore most BILLmanager modules.

Some packages are not restored by the command above. For example, payment modules, the Telegram module or online cash register modules. To restore these:

Connect to the source and new platform servers via SSH with root permissions (root by default). For more information about connecting via SSH, see Workstation setup.

Run the command on both servers:

AlmaLinux

rpm -qa|grep billmanager

Ubuntu

dpkg -l|grep billmanager

Compare the output of the command and install the missing modules on the new server:
AlmaLinux
```
dnf install <package_name>
```
Ubuntu
```
apt install <package_name>
```

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