Hi,
yes, you need to delete the PlayMaker utils and import ArrayMaker again from the Ecosystem. You must have PlayMaker Utils, but you have an old version, you need to update it. Installing ArrayMaker will get you the latest version of PlayMaker utils.
Unity do not allow Editors to function properly while there are errors in the console, it's very annoying, and so yes PlayMaker menu won't be there.
replacing the script to remove the error means reinstalling playmaker utils, or manually removing the offending lines, if you are ok with opening the script ( double click on the error, you can simply comment out the lines giving you the error, but you need to know scripting a bit to not create more errors...
Bye,
Jean