The JSON response could not be parsed

I always get this error reccuring, What’s causing this

This usually happens when the response returns unparseable content (invalid json). Are you dumping stuff somewhere?

No

Are there any steps to reproduce this in a fresh Starterkit?

I do have the same / a similar problem and started off with plainkit.
However already created some simple templates (migrated from getSimple CMS to kirby).
I suspect it is the “null” preceeding the API status.

Blockquote
null{“status”:“ok”,“message”:“ok”,“code”:200}

Any idea where it could come from?
Thanks in advance.

Turned out to be a permission issue, unfortunately so low level that it did noch even reach the layers in kirby being able to hint to this.
I detail: the container php is running had an incompatible user id with the host machine.