MyParcel Pickup plugin gives a error 500 when we want to save

Hi,

Please activate the "error reporting" and "debug mode" settings of the Joomla configuration and try again.
You should then get a better error message.
If not you need to check in the PHP error log of the server.
The only issue I can think off could be that you're using an old version of the "track and label" MyParcel plugin as we had to release a new version for it to work well with the pickup plugin. An old version of that plugin could generate a crash like that as it wasn't made to work side by side with the pickup plugin.