I didn't have any problem. Things I noted:
- Save was not checked on loading the scene, so I checked it, and I saved it to a local directory (all my machines have this directory set up independently on them so that I don't save over a network)
- There were quite a few missing textures, so I just ran the test without them
- Some normal maps appear to be using incorrect gamma, according to the Corona error message. I left those unchanged.
- A region is enabled in Max (a Max region, not a Corona region). I am not sure if regions work well over Backburner or other network rendering, so I disabled that and rendered the whole view.
- I dropped passes to 3 since it is a large render and takes a long time to render, and a long time to denoise all the elements
- The render is quite a large resolution. Memory peaked at 25GB here during denoising. How much RAM is installed on your servers?
- Resulting "CGI_05_Bathroom_Test_Back_NDE2_CMasking_WireColor.tga" did not have the noise you show (noise in the edges due to low number of passes so AA not cleaning up, but that's not what shows up in your image)
- It also looked fine in the VFB on the Server as it was rendering
- Just to be sure (it is easy to get this wrong, I know because I have done it!), you are absolutely 100% sure (and have reinstalled Corona to be sure) that it's the same version of Corona and same version of Max installed on Manager and Server?
- I am rendering using the latest daily of Corona 7 (May 10th), in Max 2021
- Since this is not an animation, I only had one Server running (one that was not the submitting Manager machine), and only that one remote machine does the rendering since no DR is in use