Invalid Mappings? (Just getting started)

[dodo_bear]

I'm attempting to create my first minecraft mod, using ForgeGradle and Intellij IDEA. I've been following McJty's tutorial (https://www.mcjty.eu/docs/1.20/ep1) and just finished making the changes to the properties and build files. When I executed the command "gradle genIntellijRuns" through the gradle tab, I recieved this error message:

> Task :createMcpToSrg FAILED

Execution failed for task ':createMcpToSrg'.
> Invalid mappings: task ':createMcpToSrg' property 'mappings' Could not find archive

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --debug option to get more log output.
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> Get more help at https://help.gradle.org.
BUILD FAILED in 4s
3 actionable tasks: 2 executed, 1 up-to-date
Watched directory hierarchies: [C:\Users\timot\OneDrive\Documents\Java\Minecraft Modding\aegisprotocol]

 

I looked for a solution on the forums and found a suggestion to change my mapping type in the properties file from official to parchment, but making this change resulted in the same error. Any ideas as to what I'm doing wrong?