When I try to insert a spam link (listed on MediaWiki:Spam-blacklist) on mobile, I get the standard error message [[https://translatewiki.net/wiki/MediaWiki:Mobile-frontend-editor-error/en|Error, edit not saved.]] without any notice on what caused the problem. It should be somehow shown to the user so that they can correct it.
|Resolved||matmarex||T167078 Spam links trigger unknown error on mobile|
|Resolved||marcella||T228897 Unhelpful error message: "Error, edit not saved." (mobile-frontend-editor-error)|
I can't reproduce this problem. When I tried to add a link from the spam blacklist, I got a message specific to the situation. Can you give more specific steps to reproduce?
I should note that presenting users with absolutely gigantic walls of text like that is a usability disaster and violates some fairly basic tenets of modern web design. Alas, this is not going to change.
I tested this again.
The behavior in mobile wikitext editor is roughly the same – there's still the same error message, although the layout has changed since T167078#3320072 (and I couldn't reproduce the issue in T167078#4289978).
My screenshot (in visual mode) shows the default error message, which is much shorter than on English Wikipedia, but the text of the message lies within the purview of each site's community.
Given the above, I don't think this is a blocker to T221185: Prepare visual editor to be a default mobile editor (although obviously it would be good to fix at some point).