Getting an error while try to open project in Testcomplete 9.3

Have you tried reinstalling Test Complete yet? The error you have posted "looks" like it is probably unrelated to the project you are trying to open, but you can determine that by seeing if you are able to create a new project. So try to create a new project, if this doesn't work try reinstalling Test Complete. I'd also recommend upgrading to the latest Test Complete 10.10 version as they may have addressed your issue with that build.