Zend certified PHP/Magento developer

Magento 2.4.5 deploy static content files nog found

I want to (re)install my Porto theme in my test environment, but when deploying static content there are a lot of errors about files that are not found (and also are not there).
Why are these errors and offcourse, how to solve…

Compilation from source /home/jilco/public_html/app/design/frontend/Smartwave/po  
rto/Magento_Swatches/web/images/loader-2.gif failed
MagentoFrameworkViewAssetFileNotFoundException: Unable to resolve the sourc  e file 
for 'frontend/Smartwave/porto_child/nl_NL/Magento_Swatches/images/loader-  2.gif' in 
/home/jilco/public_html/vendor/magento/framework/View/Asset/File.php:1  61