I upgraded rails to 4.2.1 and roadie-rails to 3.0.5. After that, with no code change, sending emails started to fail with something like unable to find to the following file:
/assets/application-00acbfe0213dff8c5ba7232e3dabb3584c9e216bdb489f69d7aa20e0e101f3e6.css
It turns out that the problem is that rails upgraded sprockets to version 3 from version 2. Roadie 3.0.5 will not work with sprockets 3.
The solution was to manually downgrade sprockets back to version 2.
I upgraded rails to 4.2.1 and roadie-rails to 3.0.5. After that, with no code change, sending emails started to fail with something like unable to find to the following file:
/assets/application-00acbfe0213dff8c5ba7232e3dabb3584c9e216bdb489f69d7aa20e0e101f3e6.css
It turns out that the problem is that rails upgraded sprockets to version 3 from version 2. Roadie 3.0.5 will not work with sprockets 3.
The solution was to manually downgrade sprockets back to version 2.