No tracking

I have installed your plugin on 3 sites and 2 of them working perfectly. On the other hand http://www.hazigyogytorna.hu shows no data at all.
I have cleared the cache many times and installed Disable Rest API plugin, but it does not help at all.

Please assist me!
BR
Ildiko

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