show read flag even if connector shows an error

[Albirew]

Currently, when a connector shows an error, we can't know what was the latest chapter we did read (in order to switch to another connector for example).

BTW, this was showing on Hakuneko:

edit: if an error is showing, it doesn't even shows chapters already downloaded in a previous session

[Sheepux]

download status isn't persisted (yet)

also, please give the test case (url) the reproduce the issue

[Albirew]

If this is for fixing the connector, you don't have to, I used a region-locked connector with VPN in order to specifically show an error.

if not, it was black clover on mangaplus by shueisha connector (with VPN located in Japan)