Errors compiled... cant enter playmode

I am very new to unity and it says I cant enter playmode untile all complier errors are fixed. there are two errors as far as I can see.
Assets/Standard Assets/Image Effects (Pro Only)/AntialiasingAsPostEffect.js(18,40): BCE0018: The name ‘PostEffectsBase’ does not denote a valid type (‘not found’).
-AND-
Assets/Standard Assets/Image Effects (Pro Only)/Vignetting.js(8,57): BCE0018: The name ‘PostEffectsBase’ does not denote a valid type (‘not found’).

How can I fix these?

Well, the problem here is that the asset named “PostEffectsBase” is not imported. If you do not have Unity Pro, then delete the two files that are causing the problem (or just the entire “Image Effects (Pro Only)” folder, as you cannot use any image effects if you do not have Unity Pro). However, if you do have Unity Pro, go to Assets, Import Package…, Image Effects (Pro Only), and then either import the entire package or just the “PostEffectsBase” file by clicking “None”, then finding the “PostEffectsBase” file (located near the bottom) and ticking the box next to it. When you are ready to import, click “Import” and the errors should go away. If the errors persist, import what it says is missing. In this case, it was the “PostEffectsBase” file.