If the activation failed

A message may appear when activating or working with the panel:

Note.

“No license available for your server. Perhaps the key has already been used, or the key has expired, or the installed product version is higher than the one to which the specified key can be used to upgrade”.

This error occurs for several reasons.

The server license5.ispsystem.com is not available

Make sure that license servers license5.ispsystem.com and 86.license5.ispsystem.com are accessible from your server and respond on port 80. For example, you can check accessibility of the license servers with the curl utility.

IHTTPD port is not accessible from the outside

By default, the built-in web server (IHTTPD) listens on port 1500. It must be available. You can configure IHTTPD to listen to other ports following the instructions for Configuring the built-in web server.

The server has not yet updated the file

You have just renewed your license and the license server has not yet updated the file. Updating the license file usually takes 10-15 minutes. Possible solutions:

wait 10-15 minutes, the license will activate automatically;
in the client area, enter Licenses → select the license → menu → Edit, generate a new key and specify it in the "Activate existing" field.

Note.

By default, you can generate a key no more than once a month. If this limit is reached, please contact the ISPsystem technical support.

The version of the panel installed on the server is higher than the license version

If you are using a perpetual license, you may have a situation where the server has a higher version than your license. You can find out the current version of the panel with the commands:

for CentOS:
```
- rpm -qa |grep coremanager
```
for Debian:
```
dpkg -l |grep coremanager
```
for any OS:
```
/usr/local/mgr5/bin/core -V
```

If the version on the server does not match the version of the license, you need to renew the update package.

Server time does not match

The time on the server does not match the time on the license server. Synchronize the time on the server with the clock of the time servers (NTP).

IP address does not match

IP address does not match. The IP address specified when purchasing must match the actual IP address of the server.

You are using a panel version lower than 5.45

Check the current version with the command:

/usr/local/mgr5/bin/core -V

This command will show the version on any server. If the version is lower than 5.45, update it following the instructions in the documentation.