homepage line 1 AIzaSyBpoaalzCulBOWFqcd5Fmpl59NIQm7Kcmo

When i set a panelpage as my homepage it prints 'AIzaSyBpoaalzCulBOWFqcd5Fmpl59NIQm7Kcmo' on the first line. This does not happen when the same panelpage is not my homepage. The error is nowhere to be find in de templates of my theme and i can not find another module that is printing this on the first line. Searching for days now, all help is welcome! Thx.

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