Here are some tips to help you troubleshoot problems.
By setting the logging level to debug or trace, you will see lots of useful information that might help you spot the problem. Logging level is set with --log <level> option which is available for all commands,
This is how you set logging level to trace:
tkm stacks deploy --log trace
To understand how Takomo interacts with AWS APIs you can use --stats option to instruct Takomo to print various statistics after executing a command.