@lsly and @Manish_Sharma can you please open a new thread next time. This thread is older than a month and is related to another problem.
Still, thank you very much for reaching out to us. This is a new issue that seems to be affecting many of our users in the last days, even though we had no updates applied. I am wondering if there is an issue with Strigo or more specifically AWS in the way they serve their instances.
We are currently investigating and will let you know what we find out. The short term solution we can offer you is to replace your lab environment, which means things will work again (at least initially). Unfortunately, you will lose any work done. Send me a private message with your email if you want to follow this path and I will replace your labs.
BTW, this issue might be a better one to follow up on the current problem: