I installed this plugin, but only for testing. I noticed that the servers are in groups 1 - 21. In all servers I changed to group = 1 and then the update worked(maybe not for all). Unfortunately, some servers are no longer active or need to solve a captcha or are tied to an IP address, so they cannot be updated. In any case, copy the servers to notepad, let them all be in the same group,copy to oscam.server and then try to update.You can also change group direct from Webif ( Files > oscam.server ) and after changing Save > Restart oscam.
After installation, servers are only added to oscam.server. All other settings (oscam.config, user, dvbapi, Softcam.key) are not changed in the settings. It is a problem for those who have a local card because it is deleted config in oscam.server after installing the plugin. Maybe there is a solution for that.