Can the bug be found among the known bugs in the trello Trello? If so, upvote it there instead!
What is the bug?
Answer: Core Acess Bug
How often does the bug happen? (Everytime/sometimes/rarely)
What steps do you need to take for it to happen? List them in very high detail: Use a crowbar and click several times to access the main window with a crowbar
Is the bug related to GUI or something that only happens for you? (GUI = the dealership, derby win screen or any other interface)
If yes, screenshot all unique red and yellow text in the developer console and post it here. (Open console by opening roblox settings, scrolling to the bottom and clicking the open developer console button.)