Invalid CSRF Protection Token Error When Creating Billable Items

Symptom

After updating to WHMCS 8.7.1, admins may encounter an Invalid CSRF Protection Token error in the text fields when they create new billable items.

Solution

Apply the 8.7.2 Maintenance Release via Utilities > Update WHMCS.

Hotfix

We have created a hotfix for WHMCS 8.7.1 to resolve the error:

https://whmcs.community/files/file/187-core-18458-invalid-csrf-protection-token-error-creating-billable-items/

Workaround

Clear the Invalid CSRF Protection Token error from Product Name and Amount. Then, enter the desired values.