Exception information: JSON.parse Error: Invalid character at position:1 - Line 1

[trwnh]

(Please tell us what you were doing when this happened.) Exception information: JSON.parse Error: Invalid character at position:1 - Line 1

Just logged in for the first time after installation, in Microsoft Edge 16 on Windows 10 Fall Creators Update.

EDIT: Also happens in Firefox 58.

EDIT 2: Doesn't happen in Chrome 64.

EDIT 3: Only happens when I login via my local IP 192.168.2.x, does not happen when logging in via localhost.

EDIT 4: Scratch that, happens with both in Edge.

EDIT 5: Also getting this - Exception information: SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data - Line 1

[stan-radu-andrei]

did you find any solution? I have the error too