I can not access ip Google Cloud

I have a server configured in Google Cloud hosting a system for company testing. I was able to access the system normally with ip and port 8080 by the browser, but I can not get more and the interesting thing is that I just can not when I try from inside the company, I did tests outside the company even using the same internet provider and it works normally. When I change the external ip of the company, access works and if I change the external ip of my VM in the Cloud also works, but after a while it stops working again. I can not even ping from inside the company to the VM's IP in the Cloud. Does anyone here use Google Cloud and have you experienced this, or do you have any idea what that might be?