[SOLVED] 0 Cannot use object of type stdClass as array.

I am nor sure if there some king of connection with an issue I am having with Kunena during my migration from Joomla 3 to Joomla 4.   

I am just  trying to source ou the meaning of the error message "0 Cannot use object of type stdClass as array'

When not logged in I only see bits of the bulletin board, but once logged in only see the above message.

I realize this is not likely a CB issue but would love to know if you've seen this error or perhaps help point me to what it could be.

Thanks!

You have to uninstall Kunena before migrating to Joomla 4. Then install Kunena again once on Joomla 4. Kunena isn't compatible with 3 and 4 at the same time like CB is. Kunena will detect your database on re-install though and deal with migration. That's what we had to do anyway during our internal migration for Joomlapolis.

I've no idea whether your error is from Kunena or CB or not though. You'd have to provide the full callstack for the error that shows what file it occurred in.

Thanks, I uninstalled and then reinstalled it but saw errors like "Specified key is too long; Max key length is 1000 bytes" during the reinstall.   The table conversion appears to have failed.    I have a post on Kunena's forum as well but thought I'd check here just in case there was other insight.

 

Update:  Just learned that the stdClass is an issue with Kunena 6.25 and they've suggested installing 6.24 instead (regression)

The "Specified key is too long; Max key length is 1000 bytes" still exists though.

You'll have to figure that out with Kunena. We're not Kunena's developer. That error though usually means a database table index is too long.

It being limited to 1000 bytes though is strange as that's really low and far below MySQL innodb defaults (which is 3072 bytes). Suggest contacting your host and having them fix that. Might just be a matter of fixing your table collations since you're coming from Joomla 3 you'll probably have to. Can generally do this from phpmyadmin under the Operations tab using the below.

Table options
Collation: utf8mb4_unicode_ci
Change all column collations: CHECKED

Maybe your database tables are still set to MyISAM and not Innodb? Can again fix that in phpmyadmin. Sorry, don't know what more to suggest as we're not Kunena's developer and you'll need to let them know.

Thanks for the additional insight on the byte limit error.  I will have a closer look at the tables as you suggested.    To clarify all Joomla 4 tables need to be utf8mb4_unicode_ci collation?

Regarding the "stdClass as array: error,  there was a recent post about the issue.   Seems to need adding back code for their CB integration as indicated here:
www.kunena.org/forum/k-6-2-0-support/168385-cannot-use-object-of-type-stdclass-as-array?start=0#231095

Hopefully, they will add the fix in future updates.