Inconsistent error messaging in frontier ui - client-demo and admin apps both

[rohilsurana]

Describe the bug
Some error messages are very generic, while some show internal information like status code etc
We need to make sure that we show a message that is easy to understand for the customer.

Details to be added - @paanSinghCoder

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.