Issue with code injection for pages

Hi all, I wanted to activate Google Tag Manager and Analytics and while Google provides me with codes (for manual input), I cannot include those into Squarespace pages as I need an upgrade. However, when I got to my subscription and compared plans - I was unclear about which plan I should upgrade to... Does anyone know? 

Also for Google Analytics, I used the integrated option with the code --- but that didn't seem to have worked as I still get this message:

 Is this an error on Google or Squarespace's side??

I am not sure what to do... also, first time user here 😞

Thanks!

T.

1 hour ago, tsalaj said:

I was unclear about which plan I should upgrade to... Does anyone know? 

For Code Injection you need the Business plan or higher. The Personal plan is the only one that can't access those features.

1 hour ago, tsalaj said:

Also for Google Analytics, I used the integrated option with the code --- but that didn't seem to have worked as I still get this message:

Hard to say where the problem is here, when did you add the GA code?