What is a JSON string?
JavaScript Object Notation is used primarily to transmit data between a server and web application, as an alternative to XML.
Question:
What do I do if I receive an "invalid JSON string" error
message?
The more common "invalid JSON string" error messages seem to occur when uploading a file from file picker in Moodle.
figure 1
Answer:
The issue appears to be resolved in Moodle 2.3.4 for all browsers. You do have to change all the permissions so the owner and group is apache:apache, but this will resolve the issue.
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