The message ‘Maximum time required will exceed computation quota’ pops up when you are trying to launch your simulation. It indicates that your Simulation Control settings (see Project Tree on the left side of your screen) are such that your computational core hour quota would be exceeded during the run.
Computational time is calculated by multiplying the Number of Computing Cores (1, 2, 4, 8, 16, or 32) by the Maximum Runtime (in seconds) which is then resolved into a computational usage metric called core hours. The number of core hours that you have available depend on your account type (free, academic, commercial).
You should reduce the Number of Computing Cores or the Maximum Runtime (or both) to a range that will not exceed your computational quota and then proceed with running your simulation.