Solved After migration to Joomla 4.1 : 0 Class "KunenaTemplate" not found

Hello xillibit,
I have migrate joomla version 3.10.10 to joomla version 4.1.5. It is well done
Then I installed Kunena 6.0.2 succesfully but when on my web site I try to go to my forum It dos not work and I receveid error 0 with the following message :
    0 Class "KunenaTemplate" not found
Si les difficultés persistent, merci de contacter l'administrateur de ce site et de signaler les erreurs ci-dessous.

Could you help ,
Thnakyou in advance
Mike

 

== Message moved and a new topic created ==

Go in the backend to Kunena -> Templates. Mark Aurelia and save it.

Thank you for your answer.When I installed Kunenena V6.0.2  Template Aurelia was supplied as standard with installation process.When I began with kunena 6.0.2 ,Template Aurelia was the only on my Template list and selected by default.And of course my forum seems to work (see the picture hereunder).Then as I was usind Blue 5agle5 V1.6.7 succefully with joomla 3.10.10 (please see the picture here under), I installed this  Blue eagle5 V1.6.7 on joomla 4.1.5 and when I set it by default as template, my forum is not working any more as described previously.
As you can see the layout obtained with blue Eagle is nice, that's why I would like to use this Template as default.
Thank you for helping
Best regards
Mike

I have to disappoint you Template Blue-Eagle does not work with Kunena Version 6.
As far as I know, there is currently no plan to modify Blue Eagle. It's not completely impossible, but don't count on it.

Thank you Leen for your answer even this is not what I expected.
Do you know if there is some other template alternativ (except Aurelia) to go through

As far as I know, there is only one provider for Kunena 6.0 templates so far. At least, nothing else is known to me.
You can find this address on the advertising banner on the right, or in the backend under Kunena -> Templates.