Latest Update 2-11-2026
This article walks you through how to test whether WebSockets are blocked, how to fix the issue, and what to whitelist so Planera can load properly.
Step 1: Disable Anything That May Block WebSockets
Many browser extensions or security tools can block WebSockets
Disable any ad blockers, script blockers, or VPNs
Refresh the Planera app to see if it loads
If Planera now loads, the issue was caused by an extension.
If not, continue to the next step.
Step 2: Test Whether WebSockets Are Working
Let the test run automatically
If all tests show “OK”: WebSockets are working correctly
If any tests fail or show “FAILED”: Your network is blocking WebSockets
Step 3: Whitelist Required Domains
If WebSockets still fail after disabling blockers, your IT team may need to whitelist the domains Planera uses.
Provide the following list to your IT department:
Domains that must be whitelisted
Domain | Service Name | Application Purpose | Additional Notes |
*.planera.io | Planera | Main Website and Cloud service hosting | This endpoint uses Websockets, so it should be configured to allow long lasting connections, and we suggest Bypassing proxy and SSL inspections. (PAC |
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Amazon Cognito | User authentication |
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*.amplitude.com | Amplitude | Problem reporting |
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*.calendly.com | Calendly | Calendar features |
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*.datadoghq-browser-agent.com |
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*.browser-intake-datadoghq.com | DataDog | Monitors and alerts |
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Fonts used in Planera application |
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*.intercom.io |
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*.intercom.com |
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*.intercomcdn.com |
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*.intercomassets.com |
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intercom.help | Intercom | Customer service management |
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*.launchdarkly.com | Launch Darkly | Application feature management |
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*.stream-io-api.com | Stream | Comment management |
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*.loom.com |
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*.cookielaw.org | Misc. | Documentation |
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SendGrid | Email notifications from Planera |
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Step 4: Re-run the WebSocket test
Return to **https://websocketstest.com/**
Verify all tests now pass
If all items are green, Planera will load normally.
Step 5: Still not working?
If your WebSockets still fail after following all steps, please contact us at [email protected] and include a screenshot of your WebSocket test results.