Error:

[!] There was an error parsing `Gemfile`: syntax error, unexpected
string literal, expecting `do’ or ‘{‘ or ‘(‘ – gem ‘addressable’, ‘2.2.6’
    ^
/home/ots/onetimesecret/Gemfile:7: syntax error, unexpected ‘,’,
expecting end-of-input
gem ‘addressable’, ‘2.2.6’
                 ^
. Bundler cannot continue.

 #  from /home/ots/onetimesecret/Gemfile:7
 #  ——————————————-
 #  gem ‘bundler’, ‘2.3.17’,
 >  gem ‘addressable’, ‘2.2.6’
 #  gem ‘rack’, ‘2.1.4.1’
 #  ——————————————-

Solution:

Remove ‘,’ at end of line gem ‘bundler’, ‘2.3.17’ in file Gemfile