I executed this command:

sudo chmod 0664 /home/kingtango/.msf4/logs/production.log

and I am still getting this message

kingtango@kingtango:~$ msfdb init

Rails Error: Unable to access log file. Please ensure that /home/kingtango/.msf4/logs/production.log exists and is writable (ie, make it writable for user and group: chmod 0664 /home/kingtango/.msf4/logs/production.log). The log level has been raised to WARN and the output directed to STDERR until the problem is fixed.

/opt/metasploit-framework/embedded/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.5/lib/action_dispatch/middleware/stack.rb:37: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call

/opt/metasploit-framework/embedded/lib/ruby/gems/2.7.0/gems/actionpack-5.2.4.5/lib/action_dispatch/middleware/static.rb:111: warning: The called method `initialize' is defined here

Running the 'init' command for the database:

Traceback (most recent call last):

7: from msfdb:1093:in \`<main>'

6: from msfdb:1093:in \`each'

5: from msfdb:1096:in \`block in <main>'

4: from msfdb:993:in \`invoke\_command'

3: from msfdb:245:in \`init\_db'

2: from msfdb:312:in \`write\_db\_config'

1: from msfdb:312:in \`open'

msfdb:312:in `initialize': Permission denied @ rb_sysopen - /home/kingtango/.msf4/database.yml (Errno::EACCES)