I am receiving the error "Parameter for Custom Dimension is too long (max 150)" from Google Analytics, what should I do?

Google Analytics has a limit on the number of characters (bytes) for custom dimensions. It is set at 150 bytes which means if you attempt to pass a group of audiences from Lytics to GA where the total is over 150 characters you will receive a warning (Parameter for Custom Dimension is too long (max 150)) in GA or Google Tag Manager and the audiences will not be received in GA.

You can attempt to overcome this by reducing the name lengths of your audiences or by deselecting API access while editing the audience in question. Disabling API access means the segments will not be 'public' and therefore will not be passed to GA.