Try deleting the addon's GMA file from the Garry' Mod addon folder, and allowing Garry's Mod to re-download the addon. Tick it in the pop-up menu that appears when you click on the game controller icon in the bottom right of the Garry's Mod main menu. As well, be aware that despite attempts to prevent conflicts, other workshop items might still conflict with.
Do note that while no game should be required, the size and scope of the map might cause some issues for users on lower end PCs despite rigorous optimization. The map file itself should be 'gm_coast_bridge', minus the quotation marks. gmodparkourmap (gm_edgeparkour) Created by rzrap. The 2.0 version is heavily optimised and has many more interiors. gm_contrast_2 is a large, open map set in a heavily class-segregated city, the upper class area takes up most of the map, with a small playable area for the lower class side.
I've reached a point where I can't even add an entity to the map (: The map is very large and full of amazing functionality. Hello, I present to you my SCP-RP map that I have built over the years.