Unable to connect using the Metalogix Extensions Web Service (MEWS) adapter (4318528)

When connecting to SharePoint using Metalogix Extensions Web Services (MEWS) adapter, one of the following error messages is displayed:

Cannot find Metalogix Web Extensions on the target. Please ensure that the correct version of the Web Extensions is installed on the target, or try connecting at the Site Level.

The Metalogix SharePoint Extensions Web Service is not installed on this server. For more information on how to install the Extensions Web Service refer to the documentation.

The MEWS component is either not installed/deployed on the environment being connected to or it does not match the Content Matrix Console version being used to connect.

1. Check if metalogix.sharepoint.adapters.extensions.x.x.x.x.wsp and metalogix.sharepoint.shared.x.x.x.x.wsp are installed and deployed on the environment by going to Central Administration > System Settings > Manage farm solutions.
   
   NOTE: x.x.x.x represents the MEWS component version (e.g. 7.4.0.1).
   
   
2. If one or both of the solutions are not listed, or they do not match the Content Matrix Console version being used to connect, install MEWS by running the corresponding Content Matrix setup file.
3. If both solutions are deployed and match the Content Matrix Console version, check if Metalogix.SharePoint.Adapters.Extensions in C:\Windows\Assembly or C:\Windows\Assembly\GAC_Util match the console and MEWS version.
   
   
4. Open a browser on the machine where the Content Matrix Console is installed, then access the following URL:

   https://DOMAINURL/_vti_bin/ml/X.X.X.X/mlspextensions.asmx

   Note: DOMAINURL represents the domain and X.X.X.X represents the MEWS component version (e.g. 7.4.0.1).

   If the URL resolves and shows the web service interface in XML, it means the service is operating well and can be accessed from that specific machine. If not, either MEWS is not installed correctly or the network does not allow it to be resolved.

5. Perform a repair Repair operation of the remote Metalogix Web Service Extensions. This is accomplished by running the Content Matrix installer as Administrator on the WFE directly, choosing the WSP options, and then the option to Repair.

        6. Retract and remove both solutions, perform IISRESET on all WFE servers in the Farm, then re-deploy the solutions manually using                      PowerShell or stsadm. 

The steps can be found here: 

https://docs.microsoft.com/en-us/powershell/module/sharepoint-server/add-spsolution?view=sharepoint-ps

https://docs.microsoft.com/en-us/powershell/module/sharepoint-server/install-spsolution?view=sharepoint-ps

Note: If the URL on step 4 is still not accessible after performing the above steps, please contact your administrator for further assistance with a possible network-related issue.