1. The loss of Irradiance Map files will result in the render job output to be black, flickering in animation or fail to render etc.
2. If your render job requires the usage of Irradiance Map, you will need to find the source file inside the Irradiance Map file and load it correctly, save the file and submit the job as shown below:
3. Alternatively, ignore the prompt and set the parameters at the desktop client parameter page as shown below: