If you are unable to see any employees on the company planner filters, or the employee list appears and disappears:
On your browser, click the 3 dot menu on the top right.
On the Zoom field, select - to zoom all the way out.
Select + to return to the initial zoom settings, which shouldn't be greater than 100%.
Alternatively, you can do this by using the CTRL and - or + keys on your keyboard.
If this fails, try in a different browser or clear your browser's cache memory.
📌Note: Any value over 100% will be more likely to present resolution issues.