Insert GDPR of Quantcast?

[gnrx]

Hi,
Since some days ago, I try to add a GDPR banner.
I want appears in all pages, for this reasson, I try to insert in header template, but I can't, I have this message:

Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 262144 bytes) in /home/myuser/public_html/foro/includes/vb_template.php on line 62

If I try with more RAM the site need a lot time for load (I have resources for the site).

If insert the GDPR code of Quantcast in a block (admincp-forums-blocks and forums) work fine, appears and the site work fine, quickly load and all fine.

I try, in header template, insert this line:

<script src="https://www.mydomain.com/foro/quantcast.js"></script>

And I create the quantcast.js with the code that I have from quantcast.
But not work...

I use vb 4.2.5 with php 7.1

Some iddea?

Thanks in advance.