Dear Ivo hi, sorry to bother.
I don't know what the problem is so if you can please take a look to the below issue
In one page we get the error
0 json_decode(): Argument #1 ($json) must be of type string, array given
we cannot find out why this is happening, This page contains an article and when we try to update it in the backend we get the error
An error has occurred.
0 json_decode(): Argument #1 ($json) must be of type string, array given
same with the front ebd of this particular page.