Hi Leon,
I looked at the API documentation https://tinypng.com/developers/reference
I created a TinifySource and TinifyResponse JSON’s and their Import and Export mappings
I used 2 actions from CommunityCommons:
This is the REST call:
The link to the project can be found here built in 10.1.1. (You should add your key to the Constant)
Go Make It
This problem is solved after upgrading to Mendix 10.1.1