Sometimes Gravity Forms will not work as expected. Especially when we lose its license key. We can’t even create a single new form when it happens. In addition, Gravity Forms options/settings can’t be accessed as well.
There are some steps we can do to solve this issue.
We need to edit 2 files below:
1. In the first file, find these 2 lines of code as shown below (line 58):
$this->is_valid_key = true;
$license_key = $this->license_key;
AFTER that code, add this:
$valid = $this->is_valid_key || ( ! $this->is_valid_key && $this->accept_terms );
Now it will look like:
2. In the second file, locate the codes as shown below (line 2484):
// Caching response.
set_transient( 'gform_update_info', $version_info, 86400 ); //caching for 24 hours
BEFORE that code, add this:
$version_info = json_decode( $raw_response['body'], true );
$version_info['is_valid_key'] = '1';
Now it will work fully with any license key we use. This method was tested on Gravity Forms v18.104.22.168. However it should be quite the same for the other versions.