Hi @Zia_Ur_Rehman1! Welcome to the community!
First, one thing to keep in mind for the future. When you have a new issue like this, it’s best to create a new topic with your question, rather than adding your question to an existing topic about a different issue, like this. Creating a new topic makes it easier for mentors to notice there is a new issue that someone needs help with, and also helps other students who are trying to find if there is a post about an issue they are seeing.
As far as the timeout error you’re seeing when you try to submit - one thing to try is to click the “Restart and Clear Output” option on the Kernel menu and then try submitting again. If you still get the same error, maybe you are having the same problem as this student:
(The link above will take you to the entry in the thread where a student explains what they did to fix the problem. Feel free to look through the rest of the post for more context, but be aware there are a few different issues discussed in this one thread).
Good luck! Write back to say how it went. I’m curious to hear what you find