Hello Vivek,
if your problem is very urgent and the resolution steps are not explained in the training materials provided to you, the best way to handle that is to place an incident in your ticketing system with high priority, so that your support consultant can assist you.
Even if you decide to create an incident/support request, it is always a good approach to provide not only screenshots of the error but also the ID of the error message and speed up the resolution.
I have never seen an error message with such description in a standard system, this looks like a functionality specific to your company.