What do these errors say?

Question

Software testing

When testing the site, two errors pop up

PHP warning(500): Creating default object from empty value

JSON.parse: unexpected end of data at line 1 column 1 of the JSON data ::

I do not need a solution to these errors, just tell me what they indicate. How to understand these errors.
Thanks in advance.

Answer 1

JSON.parse: unexpected end of data at line 1 column 1 of the JSON data ::

Well, it is clearly visible that here the data suddenly ended for JSON. Either unclosed quotes / brackets / what you have a separator, or the data is not in JSON format at all. In general, the data is incorrect, it was not possible to parse them.
And the first error, most likely, arises from the second - instead of the received data, they received empty unparsed values ​​and are trying to operate on them.