Issues deleting Apex Classes with Workbench

Question

Struggling with deleting Apex Classes with Workbench. I've followed walkthroughs listed below, but I keep running into an "Invalid Parameter Value" error. The only parameter I can think of is the name of the Apex Class I'm putting in, but it seems correct to me.

Should this be working? Or should I be using a different method? (ANT, Eclipse IDE, SFDX CLI, etc.) This is my first time deleting Apex Classes in Production so I'm open to better ways or best practices. I'm currently trying to delete Apex Classes in Sandbox to test. I may be missing something. Please advise.

destructiveChanges.xml

<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
    <types>
        <members>TC_SP_Calendar</members>
        <name>ApexClass</name>
    </types>
</Package>

package.xml

<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
    <version>47.0</version>
</Package>

http://www.sf-ninjas.com/articles/6-quick-way-to-remove-apex-class-from-a-production-org

How to delete Apex class?

Answer 1

Generally speaking, as long as your ZIP format is correct, it should work. I've documented this process here. You can also use sfdx, Ant Migration Toolkit, etc. Common problems include case-sensitivity issues (the XML must be exactly right on case; it looks so there, but try copy-pasting from my previous answer), the ZIP file not having the correct format (if Single Package is enabled, XML files must be in the root, if not, should be in a nested folder), etc. There may be a problem with the Workbench. Invalid Parameter Value doesn't sound like a Salesforce-specific error. Again, try following my previous answer exactly and let me know what happens.