🐛 [Bug] RSS Feed Block Throws "Error loading block: Invalid parameter(s): attributes" When Spectra is Active

[devmohsin]

📋 Description

The RSS Feed block in the WordPress Block Editor throws a block error — `"Error loading block: Invalid parameter(s): attributes"` — when the Spectra plugin is active. The block loads and functions correctly when Spectra is deactivated, confirming Spectra as the root cause.

This was reported via the Spectra V3 Beta Feedback form.

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🔁 Steps to Reproduce

1. Install and activate WordPress with the Astra theme.
2. Install and activate Spectra v3.0.0-beta.2.
3. Open the Block Editor (Gutenberg) on any page or post.
4. Search for and insert the RSS Feed block.
5. Provide any valid RSS feed URL.
6. Observe the error displayed in the editor.

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✅ Expected Behavior

The RSS Feed block should render and function correctly without any errors, regardless of whether Spectra is active or not.

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❌ Actual Behavior

The RSS Feed block displays the following error in the editor:

"Error loading block: Invalid parameter(s): attributes"

The block fails to load entirely when Spectra is active.

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🔄 Workaround

Deactivating the Spectra plugin resolves the issue — the RSS Feed block works as expected after deactivation.

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🌍 Environment Details

Detail	Value
Spectra Version	3.0.0-beta.2
WordPress Theme	Astra
Block Affected	RSS Feed (Core Block)
Editor	Gutenberg (Block Editor)

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📎 References

• Customer Report: https://help.brainstormforce.com/conversation/1401580?folder_id=3150
• Reproduction Video: https://d.pr/v/e0AjXG
• Customer Screenshot: https://wpspectra.com/wp-content/uploads/sureforms/Screenshot-5.png

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🔍 Possible Root Cause

Spectra may be overriding or interfering with the block attribute registration of core blocks (including the RSS Feed block), causing a conflict with WordPress's block validation layer. This could be related to how Spectra v3 registers or filters block attributes globally.

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🧪 Suggested Test Cases

• Test RSS Feed block with Spectra active — should reproduce the error.
• Test RSS Feed block with Spectra deactivated — should work fine.
• Test with other themes (e.g., Twenty Twenty-Four) to isolate if Astra is a contributing factor.
• Test with other core blocks (e.g., Latest Posts, Latest Comments) to check if the attribute conflict is broader.
• Test with Spectra v2.x to confirm this is a v3 regression.
• Check if the issue persists on a clean WordPress install with no other plugins.

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Priority: High — affects core WordPress block functionality in beta release.