# HTTP error "URL Parameter error" for fal.ai request id

**URL:** <https://community.make.com/t/http-error-url-parameter-error-for-fal-ai-request-id/78064>\
**Category:** Questions\
**Tags:** error\
**Created:** [April 9, 2025, 5:41am UTC](https://community.make.com/t/http-error-url-parameter-error-for-fal-ai-request-id/78064 "2025-04-09T05:41:51Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![samliew](https://dub1.discourse-cdn.com/flex013/user_avatar/community.make.com/samliew/32/13327_2.png) [@samliew](https://community.make.com/u/samliew)\
**Post date:** [April 9, 2025, 5:48am UTC](https://community.make.com/t/http-error-url-parameter-error-for-fal-ai-request-id/78064/2 "2025-04-09T05:48:40Z")

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Welcome to the Make community!

Firstly, you need to select the concat function from the variables panel.

Secondly, you do not need to use a function here as variables and strings will be automatically joined together in a text field.

Here are some useful links and guides you can use to learn more on how to use the Make platform, apps, and app modules. I found these useful when I was learning Make, and hope they might benefit you too —

### Getting Started

- [Help Centre](https://www.make.com/en/help) | [Tutorials](https://help.make.com/create-your-first-scenario) – Make “Manual” - search for help here first
- [Make Academy](https://academy.make.com) – Basics 101: Learn Make properly to get your money’s worth

### Help Centre Basics

- [Mapping](https://help.make.com/mapping) – What is mapping? What can I map?
- [Mapping with arrays](https://help.make.com/mapping-arrays) – How to map items in an array
- [Aggregate an array for mapping complex fields](https://help.make.com/flow-control#VhcUm)
- **Date Format** : [tokens for `parseDate`](https://help.make.com/tokens-for-datetime-parsing) | [tokens for `formatDate`](https://help.make.com/tokens-for-datetime-formatting)
- [HTTP modules](https://apps.make.com/http) – Make a request, Get (download) a file
- [Webhooks](https://help.make.com/webhooks) – Error Handling, Responding to webhooks

### Articles & Videos

- [Router Magic Formula](https://www.youtube.com/watch?v=4Q-5BsCtJu4) - YouTube
- [Error Handlers in Make](https://www.youtube.com/playlist?list=PLRE9E-rAD8U10mx2TRs54Nq1XJDdK9Kx4) - YouTube playlist
- [Getting started with OpenAI](https://community.make.com/t/getting-started-with-openai-gpt-3-and-make/7796) - How to setup and use OpenAI (ChatGPT) in Make
- [Text Parser module](https://help.make.com/text-parser) - Use pattern matching to extract the text you want
- [Webhooks – Make Academy](https://academy.make.com/courses/IntermediateC04) – tutorial on how to use Webhooks

Hope this helps! Let me know if there are any further questions or issues.

— @samliew

P.S.: Investing some effort into the [Make Academy](https://academy.make.com) will save you lots of time and frustration using Make.

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