I made another post which, unfortunately, seems to have not taken. Anyway I tried logging out and back in again and, waddyaknow, it's fixed. The simplest remedy worked. As nothing else has been affected I'm still minded that it was a vBulletin glitch, though!

It was a tense moment as I was worried that I might never have been able to post again if I couldn't log back in again!

For information I'm on Win10 home and use Brave browser with DuckDuckGo search engine.

For future information these are the screenshots I couldn't show before.

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