The error message means that MATLAB is currently using the 'LCC' compiler to build the model and there seems to be some issue opening the DLL file mentioned.
If you refer to the supported compilers page, https://www.mathworks.com/support/compilers.html, you can see that LCC compiler is supported for Rapid Accelerator mode but not for S-function compilation. You can check your model if there are any S-function blocks.
You can also install any of the supported compilers like Microsoft Visual Studio and then use the following command to use change the compiler that MATLAB uses:
You might find these 2 links useful: