Extension manager JSON error

Hi Ced, no forum for it so drop it here:

Hope your extension manager is going to support Watchful.li but the main thing:

Version 1.02 does not work well on our sites:

Request Failed: parsererror, SyntaxError: Unexpected string in JSON at position 139

Reload keeps spinning and can't get much further. Bought extensions are not recognized.
Tested under PHP 7 and 5.6 on 3.6.x sites

Hi
Please remind this after the 22th august as I'm starting my holidays now
CEd