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It can happen that you get an error like the above when you startup the program or try to enable the web server. This happens often on a VPS where W3SVC is installed and enabled by default. This means that the required port 80 is used already.
There are now two solutions to this problem.
- You simply disable the web server option.
This might sound too simple but the web server is only required if you use the program with tools other than GSA Search Engine Ranker.