TroubleShooting isn't easy.
These are the steps you need to do to help me help you.
1. Always test with another theme first.
2. Always test the stack on an empty stacks page.
3. Test with another theme on an empty stacks page.
4. Or if you suspect a conflict between two stacks – remove Stacks on your page one by one and test what happens after each removal – until you find the conflict.