500 internal server error when go live on youtube

Account 

To enable all members of your organization to livestream meetings with a custom livestream service:

1. Sign in to the Zoom web portal as an administrator with the privilege to edit account settings.
2. Click Account Management and then select Account Settings.
3. Click the Meeting tab.
4. Under In Meeting (Advanced), verify that Allow livestreaming of meetings is enabled.
5. Select the Custom Live Streaming Service check box.
6. Click Save to save the changes.
7. (Optional) If you want to make this setting mandatory for all users in your account, click the lock icon, and then click Lock to confirm the setting.
8. (Optional) Update the instructions so that the meeting organizer can configure the required settings when they schedule the meeting.

User

To enable livestreaming meetings that you host on Facebook:

1. Sign in to the Zoom web portal.
2. Click Settings. 
3. Click the Meeting tab.
4. Under In Meeting (Advanced), verify that Allow livestreaming of meetings is enabled.
5. Select the Custom Live Streaming Service check box.
6. Click Save to save the changes. 
   Note: If the option is grayed out, it has been locked at either the group or account level, and you will need to contact your Zoom administrator to make changes.
7. (Optional) Update the instructions so that the meeting organizer can configure the required settings when they schedule the meeting.

How to set up custom livestreaming

Follow the sections below to set up custom live streaming for a meeting or webinar:

Meetings

1. Sign in to the Zoom web portal.
2. Click Meetings.
3. Click Schedule a Meeting and enter the required information to schedule a meeting.
4. Click Save to display a set of tabs with advanced options.
5. Click the Live Streaming tab, then click Configure Custom Streaming Service.
6. Follow the instructions located in the green box, which were provided by your administrator. Contact your administrator if the instructions do not include sufficient information, or enable Configure live stream during the meeting to enter the details live. 
   
    
    
7. Click Save to save your livestreaming settings.
   The host will be able to livestream this meeting without needing to add these settings after the meeting begins.

Here is an article for reference https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0064210