After clicking play it downloads up to 1 MB and then stops. After that, it shows the attachment below
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Hello.
I am not using any mods and I checked multiple times if my antivirus or firewall was blocking the game which does not seem to be the case. attaching the log file.
Hi again!
Could you please uninstall the Launcher, delete .minecraft folder (copy its content elsewhere before deletion) and then reinstall the Launcher?
Also, please check solution from Ryan in here MCL-21565, it might be helpful.

Hello again.
I tried Ryan's and your solutions but they both lead to the same error. I attached the error above.

Thank you for your report!
We're tracking this issue in MCL-5546, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as invalid. Please take a look at the parent ticket (MCL-5546) and see if an explanation is provided there in the description of the ticket or in the comments for why this issue is invalid.
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Hi there!
Please upload Launcher_log file from .minecraft folder.
Are you using any mods?
Please also see if your antivirus or firewall is not blocking your connection.
This ticket will automatically reopen when you reply.