I couldn’t access the admin/editor for a specific page (and a CPT) when logged in—got a “critical error”—while the page loaded fine for logged-out users; deactivating Toolset/Toolset Maps restored access, and the error email showed a memory exhaustion in toolset-maps.
Solution:
After testing (theme/plugin isolation), the issue was not Astra Pro but resource usage from many Google Map markers; disabling the Query Monitor plugin allowed the backend page to load again, so I’ll keep Query Monitor off for now.