Scripting Symbols

One last step is required for Photon integration to work properly. You may see some errors in the console after installing the Networking Module. To fix them, go to Player Settings > Other Settings > Scripting Define Symbols, and add two new lines:

PUN_2_0_OR_NEWER
PUN_2_OR_NEWER

This is how your setting should look like:

SCRIPTING DEFINE SYMBOLS