Working OK but get this error!

[googygreg]

brew services list
Yields:
httpd error 256 myshortname ~/Library/LaunchAgents/homebrew.mxcl.httpd.plist

Here is content of the above file:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>EnvironmentVariables</key>
	<dict>
		<key>PATH</key>
		<string>/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin</string>
	</dict>
	<key>Label</key>
	<string>homebrew.mxcl.httpd</string>
	<key>ProgramArguments</key>
	<array>
		<string>/usr/local/opt/httpd/bin/httpd</string>
		<string>-D</string>
		<string>FOREGROUND</string>
	</array>
	<key>RunAtLoad</key>
	<true/>
</dict>
</plist>

I checked that the folders in the PATH statement all exist, and they do.
Thanks in advance