Getting Multiple Errors

[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [gm -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/GraphicsMagick.php on line 49
[19-Oct-2020 08:08:18 UTC] PHP Warning: Invalid callback WebPConvert\Convert\Converters\Gd::errorHandlerWhileCreatingWebP, cannot access protected method WebPConvert\Convert\Converters\Gd::errorHandlerWhileCreatingWebP() in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Helpers/JpegQualityDetector.php on line 73
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [identify -format ‘%Q’ ‘uploads/70024103-240×135.jpg’ 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Helpers/JpegQualityDetector.php on line 73
[19-Oct-2020 08:08:18 UTC] PHP Warning: Invalid callback WebPConvert\Convert\Converters\Gd::errorHandlerWhileCreatingWebP, cannot access protected method WebPConvert\Convert\Converters\Gd::errorHandlerWhileCreatingWebP() in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Helpers/JpegQualityDetector.php on line 98
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [gm identify -format ‘%Q’ ‘uploads/70024103-240×135.jpg’ 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Helpers/JpegQualityDetector.php on line 98
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [cwebp -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [which -a cwebp 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Helpers/BinaryDiscovery.php on line 77
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [whereis -b cwebp 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Helpers/BinaryDiscovery.php on line 55
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-103-linux-x86-64 -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-103-linux-x86-64-static -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:08:18 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-061-linux-x86-64 -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:08:26 UTC] PHP Warning: exec(): Unable to fork [nice convert -quality ’82’ -strip -define webp:alpha-quality=85 -define webp:method=6 ‘uploads/80223104-240×135.jpg’ ‘webp:uploads/80223104-240×135.jpg.webp.lossy.webp’ 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/ImageMagick.php on line 163
[19-Oct-2020 08:08:26 UTC] PHP Warning: exec(): Unable to fork [gm -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/GraphicsMagick.php on line 49
[19-Oct-2020 08:12:38 UTC] PHP Warning: exec(): Unable to fork [which -a cwebp 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Helpers/BinaryDiscovery.php on line 77
[19-Oct-2020 08:16:55 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-061-linux-x86-64 -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:19:19 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-103-linux-x86-64 -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:22:09 UTC] PHP Warning: exec(): Unable to fork [whoami 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 404
[19-Oct-2020 08:22:25 UTC] PHP Warning: exec(): Unable to fork [whoami 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 404
[19-Oct-2020 08:23:52 UTC] PHP Warning: exec(): Unable to fork [cwebp -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:23:52 UTC] PHP Warning: exec(): Unable to fork [which -a cwebp 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Helpers/BinaryDiscovery.php on line 77
[19-Oct-2020 08:23:52 UTC] PHP Warning: exec(): Unable to fork [whereis -b cwebp 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Helpers/BinaryDiscovery.php on line 55
[19-Oct-2020 08:23:52 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-103-linux-x86-64 -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:23:53 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-103-linux-x86-64-static -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:23:53 UTC] PHP Warning: exec(): Unable to fork [plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Binaries/cwebp-061-linux-x86-64 -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/Cwebp.php on line 420
[19-Oct-2020 08:23:53 UTC] PHP Warning: exec(): Unable to fork [convert -version 2>&1] in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/ImageMagick.php on line 60
[19-Oct-2020 08:23:53 UTC] PHP Fatal error: Out of memory (allocated 600834048) (tried to allocate 262144 bytes) in plugins/webp-express/vendor/rosell-dk/webp-convert/src/Convert/Converters/BaseTraits/WarningLoggerTrait.php on line 116