@YHWHDios and @bucket_of_truth Your combined solutions for editing the content.xml file inside the dlc.rpf file in the add-on map folder( in this case Nurburgring Nordschleife by Vans123 worked for me. Below is Complete text from file.

<?xml version="1.0" encoding="utf-8"?>

<CDataFileMgr__ContentsOfDataFileXml>
	<disabledFiles />
	<includedXmlFiles />
	<dataFiles>
	<Item>
      <filename>dlc_nordschleife:/%PLATFORM%/levels/gta5/nordschleife/nordschleife.rpf</filename>
      <fileType>RPF_FILE</fileType>
      <overlay value="false" />
      <disabled value="true" />
      <persistent value="true" />
	</Item>
	<Item>
      <filename>dlc_nordschleife:/common/data/gtxd.meta</filename>
      <fileType>GTXD_PARENTING_DATA</fileType>
      <overlay value="false" />
      <disabled value="true" />
      <persistent value="true" />
	</Item>
	</dataFiles>
	<contentChangeSets>
		<Item>
			<changeSetName>CCS_nordschleife_NG_STREAMING_MAP</changeSetName>
			<filesToEnable>
		    <Item>dlc_nordschleife:/common/data/gtxd.meta</Item>
			<Item>dlc_nordschleife:/%PLATFORM%/levels/gta5/nordschleife/nordschleife.rpf</Item>
			</filesToEnable>
			<executionConditions>
				<activeChangesetConditions>
				</activeChangesetConditions>
				<genericConditions>$level=MO_JIM_L11</genericConditions>
			</executionConditions>
		</Item>
	</contentChangeSets>
	<patchFiles />
</CDataFileMgr__ContentsOfDataFileXml>

Developer of the Windy City Map mod has solved this issue. Here is a tutorial video on YouTube of the fix