I am also having the same issue. I’ve done everything:
- Edited the php.ini file
- Edited the .htaccess file
- Added the WP_TEMP_DIR code to the wp-config.php file
- Made sure upload_tmp_dir= was set to On
- Created the folder in the root directory and in the wp-content directory
- Cloned all of the settings from a previous installation that had the same problem, yet works now
Why is it being dumb after a PHP7.4 update?