Could J3 template be the problem? Topic is solved

[jeabramian]

Hi everyone,
I upgraded a Joomla 3.10 site to Joomla 4 on the PC. After struggling, I got the joomla 4 administrator running and, I think, without errors. However, when I want to see the site, the page looks weird, with parts of the shell but no contents. I thought this was something related to another bad extension or setting. Then I changed the custom-made J 3 template to the Cassiopea. The site was up, although without the menu bar, the asides, and other stuff. Can I be sure the problem is then the template? I read in the forum that is very difficult to update the J3 template to J4. But at least I would like to make sure this is the problem before starting to work on a new template or adapting the old one. In summary, 1) am I right assuming the problem is the template, 2) is there any free template maker that could be recommended?
Thanks a lot,
Jorge

[Per Yngve Berg]

No J3 templates work with J4.

[AMurray]

In updating to J4, the default template should be switched to Cassiopeia. In Cassiopeia, your site should load as usual with all its original content. The missing modules could be a case that you just have to reassign the modules to the correct module positions within Cassiopeia.

A forum user here did actually produce a version of Protostar for J4 (refer to viewtopic.php?t=988263)

[sozzled]

==== slightly off-topic ====
@AMurray: truth be told, the "version of Protostar for J! 4" is not the Protostar template adapted to J! 4 but the Cassiopeia template adapted to use Protostar's module positions.
===== end off-topic =====

[jeabramian]

Thank you for the answers. Then I gather that that is the problem, right? It shows an error 500 "InvalidargumentException", behavior::caption not found.

Thank you

jorge

[sozzled]

Thank you for the answers. Then I gather that that is the problem, right? It shows an error 500 "InvalidargumentException", behavior::caption not found.

The error message comes from an attempt to use an extension that utilises the Mootools Javascript library; Mootools is not used in J! 4.x.

Enable J! debug mode and set the error reporting level to "maximum" to discover which extension is making a call to Mootools. You probably need to uninstall the extension that uses Mootools.

[jeabramian]

Thank you sozzled. Actually it was already set to true and maximum. When I call the page, the result is a list, but I don't recognize the source of error. Here I attached a screen print.

Thanks again

[sozzled]

Looks like the error comes from a template named wcce. Do you recognise that name?

[jeabramian]

Yes, I do. Is the J3 template I was telling about before. I'm surprised how quickly you got that. So definitely is the template matter! So now I have to study how to create templates...
Thank you a lot.
jorge

[sozzled]

I suggest that you uninstall the wcce template and play with Cassiopeia. Creating templates is not the easiest job in the world (and that's why I don't do that) but CSS is not too hard.

Can we mark this topic as resolved?

[jeabramian]

I think it is resolved. Thanks.