Bubble SaaS Error Handling
Error handling determines whether customers trust your product. Five error categories with correct handling patterns, a complete ErrorLog data type, the API call error pattern that prevents cascading failures, and why testing error states is as important as testing happy paths.
Error Handling Determines Whether Customers Trust Your Product
Every application encounters errors. The difference between products customers trust and products they abandon is not whether errors occur — it is how gracefully errors are handled. A well-built Bubble SaaS shows users a clear, helpful message when something fails, logs the error for the developer to investigate, and recovers to a safe state without data loss. A poorly-built one shows a blank screen, crashes silently, or worst of all, corrupts data. This guide covers every error scenario in Bubble and the correct handling pattern for each.
Five Error Categories and How to Handle Each
API Call Failures
External API calls fail for many reasons: rate limits, invalid credentials, service outages, malformed requests. Every API Connector call should have an immediate “detect error” step after it. On failure: log the error, show the user a specific helpful message (“Payment processing is temporarily unavailable — your data is safe”), and do not proceed with subsequent steps that depend on the failed call.
Validation Failures
User submits a form with invalid or missing data. Handle in the UI before the workflow runs: show inline error messages per field, disable the submit button until required fields are filled, and highlight the specific field causing the issue. Never show a workflow error for something that validation could have caught upfront.
Permission Errors
A user attempts an action they do not have permission to perform. Step 1 of every sensitive workflow should be a role check. If the check fails, show a permission error message (“Only workspace Admins can perform this action”) and stop the workflow. Never show a cryptic system error for a permission violation.
Plan Limit Errors
A user tries to create a record beyond their plan’s limits. Step 1 should check current usage vs. plan limit. If at or over limit, show the upgrade modal rather than an error. Frame this as a growth moment, not a failure: “You’ve hit your plan’s project limit — upgrade to Growth for unlimited projects.”
Data Not Found
A URL parameter refers to a record that does not exist, was deleted, or belongs to another workspace. The page should detect this via a “data is empty” condition and show a friendly empty state: “This record doesn’t exist or you don’t have access to it.” Redirect back to the dashboard after 3 seconds. Never show a blank page.
Network and Session Errors
The user loses their internet connection mid-workflow, or their session expires. For long workflows: use backend API workflows that run server-side regardless of client connectivity. For session expiry: the page load redirect on every authenticated page handles this — the user is sent to /login and returned after re-authentication.
Building an Error Log in Bubble
ErrorLog:
user → User
workspace → Workspace
error_type → text (API_FAIL / PERMISSION / VALIDATION / LIMIT)
workflow → text (name of the workflow that failed)
message → text (the error message from Bubble or the API)
api_status → number (HTTP status code if applicable)
created_at → date
resolved → yes/no
// API call error handling pattern
Step 1: Call external API
Step 2: Only when Step 1 failed:
Create ErrorLog: type=API_FAIL, workflow=”send_invoice”,
message=Step 1’s error body, user=Current User
Show element “api-error-banner”: “Something went wrong — try again in a moment”
STOP — do not run Steps 3, 4, 5
Step 3: Only when Step 1 succeeded: proceed with normal logic
// Admin error dashboard
RG: Errors in last 7 days:
Search for ErrorLogs [resolved=no, created_at > 7 days ago]
sorted by created_at desc
// Alert via Slack webhook when error_count spikes above threshold
Test Your Error States, Not Just Your Happy Path
Most Bubble apps are tested extensively on the happy path — what happens when everything works. Error states are rarely tested. Before launch, deliberately test every error scenario: enter an invalid credit card, call an API with wrong credentials, try to access a record from another workspace, hit a plan limit. Every error state should show a helpful, specific message. Every one that shows a blank screen or a system error needs fixing.
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