Server Infomation:

	PHP: 5.3.29
		- upload_max_filesize: 32M
		- post_max_size: 8M
		- disable_functions: symlink,show_source, system, exec, shell_exec, passthru, popen, proc_open, proc_close, proc_get_status, proc_nice, proc_terminate, escapeshellarg, escapeshellcmd, ini_alter, define_syslog_variables,posix_uname,posix_getpwuid,posix_getpwnam, apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,proc_terminate, posix_uname, diskfreespace, leak,base64_encodem,eval, apache_child_terminate, apache_setenv
	HTTPd: Apache
	OS: Linux 4.18.0-372.19.1.lve.el8.x86_64 #1 SMP Tue Aug 9 15:56:43 EDT 2022
PIO Check:

        SQLite Support: 1        MySQL Support: 1        MySQL Improved Support: 1        PDO SQLite3 Support: 1        PostgreSQL Support: 
Thumbnail Generator Check:

        GD Support: bundled (2.1.0 compatible)        Imagick Support: ImageMagick 7.1.1-19 Q16-HDRI x86_64 21601 https://imagemagick.org        MagickWand Support:         ImageMagick Support:         repng2jpeg Support: 
Check suitable repng2jpeg:

This server has disabled the exec() function. So repng2jpeg can't be used.