Aw, Snap! This seems to be a browser issue, not the OutSystems.
As google explains (for chrome) the Error Code: Out of Memory, there are 6 steps to check (read the details on the page).
Step 1: Check your internet connection
Step 2: Clear your cache
Step 3: Close other tabs, extensions, & apps
Step 4: Restart your computer
Step 5: Update Chrome
Step 6: Check for unwanted software
My best bet will be Clear your cache and cookies.
Regards,
Swatantra