Sorry to hear you're having problems but we'd be happy to look into this.
It would be really helpful if you could provide some more information such as how does it fail? Are there any errors reported? Is it only FlipperKit, or are other projects failing to build?
Please provide an SDU to help us in our analysis. You can upload this as follows:
Go into Central, find the device, and click on the generate SDU button
Once the sdu is uploaded, post the file name here so we can extract it and take a look
