Hi,
This indicates that there is an error with the processing of the page by the PHP engine and your web server displays that generic error message.
Usually in that case, the real PHP error message is logged in the PHP error log.
So you would have to check there to get the real error message (a "Fatal error" ) which will explain what is the problem.
However, from what you wrote, and knowing that the plugin works fine for everyone else, it's likely that the issue is related to the PHP processing hitting a memory limit due to the extra processing needed by the plugin. So increasing the memory_limit of your php.ini might be the solution. But we would need the real error message to confirm that this will help.
Could you get a copy of the PHP error log ? You might need to ask your hosting support.