I am using the official IOTA GUI wallet (currently version 2.5.4). I am having problems with the "Attach to Tangle" function. I always get the error message "invalid response".
I already changed the settings in Tools > Edit Node Configuration to recommended values but it still doesn't work.
Do I need to "Attach to Tangle" to receive IOTA? And what does the "invalid response" error actually mean?