I can’t run my apps thrue preview on dekstop and my phone…its response problem on blocks and i’ve found no errors on it…please someone help me…
That error can be caused by many different possible mistakes in your code.
Post a link to your project and someone may be able to help find the problem.
You can also use my debugging method to find exactly where the problem is: Debugging in Thunkable X (Video)
Hello @muhammadsyamilhaikal 
Welcome to the community!!
Sorry to hear about your issue.
Could you please share the specific project URL with us so we can investigate it further?
You could copy it from the top of your browser.
