You have up to 3 Mercs per Clan Battle division. If you have multiple divisions running, you should be able to have additional Mercs in those Divs so the restriction is not "clan-wide". Further, your clan members can Merc for other clans with no issue to your divisions.
You will need to bring the other 4 members from your Clan to fill each Division if you'd like to queue for Clan Battles.
Interesting. There wasn't anything changed from our end that I'm aware of, so that sounds like an interesting issue.
Did any other clans experience the same problem?
"Merc" is just when a Clan invites someone to their Clan Battle Division that isn't in their clan. They can have up to 3 Mercs in a Clan Battle Division (so they need at least 4 players from their clan).
Clan Battles tend to be a more formal experience. All the players are usually on voice comms and doing their best to work together.
There is a channel in game where people advertise that they're available for Clan Battles if anyone would like to invite them, but it's not a guaranteed thing. The best choice is to join a clan or group which does Clan Battles directly so you can experience the organized play consistently.
In the Port's Chat interface, you can select "Channels" and use the "Search for a Clan or Division" channel while Clan Battles are going on.
There are timeframes that clan battles occur on Wednesday, Thursday, Saturday, and Sunday. Please read our article to learn more: https://worldofwarships.com/en/news/clans/clan-battles-barracuda-season/
Was yesterday the first time you had played Clan Battles since the beginning of the season?
Can you give more information? When did this happen?
"only this one" meaning only that day? Or only this "entire season"?
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