Salesforce : How to activate Apex Classes feature in Professional Edition - class

I am working on a salesforce project and need to add a package. The issue is that under developer console I am not able to create Apex Classses , which leads to the following error when I add the package to salesforce.
This is the error I get when I try to install the package
After reading many forums, I came to a conclusion that i need to activate Apex Author permission under permission sets.
But the permission is not present there.
I created a developer account for salesforce in which the Apex Classes where already active and was able to import the package and make changes.
The Salesforce account is Professional Edition and is not under trial.
Any help regarding this will be appretiated.
Thanks

Currently, Professional Edition (PE) does not have the ability to create, modify, or deploy Apex classes directly in an org of that edition. This includes using Apex in an unmanaged package. The Author Apex permission is only found in Enterprise, Unlimited, Performance, and Developer editions.
If you are an AppExchange Partner, you can write apps that use Apex, and send them through security review to be installed in PE orgs (as well as Group Edition).
From the Apex Code Developer guide relating to Apex and PE, you can read about the basic statement about Apex and supported editions. In the ISV Developer Guide (for App Exchange Apps and partners), you can read the specifics of what is required to get your app to run with Apex in a PE/GE org.
If you are exploring Salesforce for the purposes of writing ISV apps for Salesforce, I would also recommend taking this short self-paced learning module on ISV basics and Salesforce on the Trailhead learning platform.
Finally, there is a dedicated Salesforce stack exchange you might also look into for further question.

Related

Trying to connect my org to salesforce cli via vs code, gettinbg the error : The REST API is not enabled for this Organization

I am starting with salesforce development but while connecting my org to salesforce cli, i am getting an error like - The REST API is not enabled for this Organization.
Please find the screenshots below -
enter image description here
And also in browser it is redirecting me to this url -
http://localhost:1717/OauthRedirect?code=aPrxGfV7WpWWFnHr1BftlZq.nONCzwSN.M7wIvI5VhKlMmdWCqzFghvEPSX729wC0OnXDqB6QA%3D%3D&state=e9d1b63ebaf1
please refer the below image -
enter image description here
Any solution? How to fix it?
You have probably signed up, accidentally, for a trial of Professional Edition, which does not come with API access. To try out development, sign up for a Developer Edition at developer.salesforce.com, which does come with API access.
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