That is definitely a software or firmware issue. These are practically the same thing on a chromebook. If you are trying to recover any content on the SSD you may be out of luck without some of the heroics outlined here:
If you read that carefully you will note that mrchromebox can probably solve your issue and maybe even preserve your SSD content in the process. You will have to discuss that process with him though. It won’t be free though I am sure. If you don’t care about ANY content in the SSD. Then by all means press space bar at step 3. You will of course need your google login/password to get your cloud content back working again. Good luck @kashifanwaar
The developer mode is kind of a double edged sword. Enabling it allows you more power and the opportunity to really do hurtful stuff to your chromebook. As shipped it is pretty hard to mess up a chromebook since you don’t really have privileges to damage much of the software/firmware that it comes with.