Hi,
I've started to create a new template to one of our site with T4 and BS5 Blank, but all the category blog type pages crashed with white death: an empty page, without any error reporting, actually no html rendered between the <body></body> tags.
I've remembered, that some months ago I had a similar issue, and found a solution in the forums, so I was able to fix it: the problem appears when there is pagination on the page and the link localization strings are containing accented letters.
In the file plugins/system/t4/themes/base/html/layouts/joomla/pagination/link.php you use strtolower(), which can't handle accented characters. If I manually rewrite all the functions to mb_strtolower(), which is the multibyte equivalent of strtolower, it fixes the problem.
It was reported and marked as resolved in September 2021 (https://www.joomlart.com/forums/d/37504-empty-page-on-pagination/3), but up until now the only way to fix it is to manually rewrite the code.
Can you fix it in the next upgrade, to T4 work correctly with language localizations?
Thanks!